lH-1

\
\I

CRUISE
COMMAND
INDEX
Page Page
Adjustments 1H-9 Regulator Raplacamanl 1H-9
Components 1H-1 Servo Cable Raplacamant tH-10
Control Switch Replacement .1H-10 Servo Chain Raplacalilant 1H-10
Diagnosis 1H-3 · Servo Replacement 1H-9
General 1H-1 Tasting 1H-5

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Operation 1H-2 .· Tools· 1H-11

GENERAL A higher speed may also be attained temporarily by

sliding the control switch to the RESUME/ACCEL po-
The Jeep six- and eight-cylinder engine electronic sition and holding. The vehicle will accelerate until the
Cruise Command operation is limited to speeds above 30 switch is released. When released, the vehicle will decel-
mph (48 km/h): At any speed above 30 mph (48 km/h), erate until the Cruise Command resumes controlling the
the unit will maintain the selected vehicle speed within throttle at the, previously set speed. If the Cruise Com~
3.5 mph (5.6 km/h) on upgrades not exceeding 3 percent mand is ON but not set at .a cruise speed; when the
(most interstate highways). A change greater than 3.5 control switch is released from the RESUl\tE/ACCEL
mph (5.6 km/h)' may be experienced with vehicles hav- position the vehicle will decelerate as the throttle
ing an economy axle ratio or wheri driving on unusually · moves to the curb idle position.
hilly terrain, or at high altitudes.
To activate the system, slide the control switch to the
ON position and accelerate to· the desired speed (above WARNING: Do not use the Cruise Command when
30 mph or 48 kin/h). Depress the SET:pushbtitton on the driving on slippery or conge$ted roaqs.
end of the turn signal switch lever! and release. The
system will be activated when the SET pushbutton is COMPONENTS
released.
The driver may regain normal control by sliding the The Cruise Command is a closed loop electro-
control switch to the OFF position or by lightly depress- mechanical servo system that consists of the following
ing the brake pedal (manual and automatic transmis- components: electronic regulator, speed sensor, servo,
sion) or clutch pedal (manual transmission). If the brake control switch, vacuum storage can and check valve (fig.
o:r clutch method is used t9 regain control, the pre~ lH-1),' and the release mechanisms, which consist of a
viously selected vehicle speed will remain in memory mechanical vacuurn vent valve: and brake (and Clutch
and may be regained by momentarily sliding the control with manual transmission) switch.
switch to the RESUME/ACCEL position when the
speed is above 30 mph (48 km/h). The memory is erased Electronic Regulator
by turning' the unit Off or by. turning the ignition switch
Off. . . . The electronic regulator receives an input voltage that
If a lower speed iBdesired. whiie cruising at a selected represents vehicle speed from the speed sensor, which is
speed, depress the SET pushbutton and hold. until the driven by the speedometer cable. The regulator (located··
vehicle decelerates to the desired speed. When the but- under the ·instrument panel) has a low speed circuit that
{) ton is released, the new selected speed will be prevents operation below 30 mph (48 km/h).
The regulator is sealed by the manufacturer ;:~.nd can-·
maintained.
If a higher speed is desired, accelerate to the desired not be serviced internally, although an external adjust-·.
speed, depress the SET pushbutton and release. ment is. possible.
 1H..2 CRUISE COMMAND

to admit atmospheric pressure. To further ensure im·

mediate servo release, a brake or clutch pedal-activated
mechanical vacuum vent valve (operating independent-
ly of the electronically controlled valves) admits at-
mospheric pressure into the servo whenever the brake or
. ·:! ,.·~:? !Cllitch pedal is depressed. A hissing sound may be heard
··' . ·· . ll).omentarily.

;.
. .OPERATIONi:.
···' . • •• f ~ •

/· ,,
. -~·. .l.

' . _; ' •, .;~ ._·. ' ..• . . ..... '

Servo
Th{) selected vehicle speed is maintained by the servo,
which controls the carburetor throttle position accord-
ing to regulator output. Two solenoid-controlled valves
are dsed to:ao'tltrol'manifold vacuum applied to the servo
(fig; ·lH-2). In the deactivated·: state, the charge valve
blocks manifold ·vacuum, while the vent valve admits
atm·ospheric pressure. The spring relaxes the diaphragm

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REGULATOR and throttl~' position is unaffected. When the charge
;,,v-alve ·solenoid .is energizetl, the ·valve is. open·ed''and
manifold vacuum moves the diaphragm to contr;olJhe,
throttle position. Throttle position is maintained:tor ahll
) ..., : ;l·...- ·. : . .'· .
806S6B
speed above 30•mph (48km/h):ljy balancing the. amount
. Fig.' lH,~ 1 El&lllronlc. Cr.Mise Command Components of vacuum charge and vacUum vent. The·controlvoltage
that accomplishes this is provided hy.the r-egulator~
spe~d :sens.o'r ··. jj ',

The speed sensor is a 'tach-generator installed between· NOTE:' Air is .rerrt(Jved from. :the vaeuum ,-stor~ge: can
upper and lowet speedo!rieter cables. It converts speed.: th~ough th~ one-'way.(check)...vq,lve whep,ev~r· the ep,gine
ome'ter cable revolutions 'into a speed analog voltage. is operating. As.. th'f3,prui,t;e Gpm/Yfoa.nd . dep/~tfl~,.t.he_.vac-. •
· ..
input for the regulator. .· ' . · · uum (replaced by air) in.the can, th,e:airis rer,noped ~=
···-
n,eeded. The; can .fun,ctions·.as a. s.to.rage..:re{lervoir and
Servo ·. : .. ·
pro'l[i,des a relat~vely.con~tantvacuum lev,el e'l)enwhen
The servo, mounted in the engine compartment, is engine. m.qfi,ifold '.vac'tf.um· is. ·decreased during engine
aeceleratiO.n. . . .. . .
controlled by the electronic regulator. Manifold vacuum
provides the force for diaphragm motion. A bead-Unk
chain connects the servo cable to the throttle linkage.

Control Switch
TO BRAKE PEDAL . . . ,
'Th~ con.tr~l .switch is ~n iritegral :Part of the ttlrn THROTTLE
. '.
VACUlJM:vt:NT · . ·. :; w
VALVE·. . . . TQJII)~NII;OLD
signal switch ·lever.It func;t~ons as a co:r:r\munication)irik POSITION . · ... · ' VACOOM
betw~en
..· . . .the
... . ddver
'.
·'.
and. -the'r.egulator
. ' : ' .
assembly:'
. . . .
'
.'. ~
PQTE~TIOMETER
.· 1..·.. ,·.J~w::~E ~ALVEl
. : .. ~· ..
Release System
VACUUM
The release system deenergizes the Cruis~ Command ·CHARGE VALVE
by two methods and both are activated when the brake '~«.?!'-.......-· SO~Ef'l910 ~OIL .

pedal (automatic and ·nutnual trans~ssion) or clutch ~"'~-VACUUM

VENT VALVE
pedal (manual transmission) is dep)J.essed. The valve:B· . SOLENOID COIL
that control·.vacuum dn·. the .servo ·ar.e,:.elect.ically. c.on· ·
trolled :by the regulator. When the brake (.or·cl:U:tch pedal
with manual transmissi9n) is . depressed; ground is .
removed(by action.ofthe switch) ftom terminaHS,of the 80'687
electronic regulator to deactivate the servo. The servo . ~ ! ,i

charge valve is closed and the servo vent valv;e is opened . Fig.· tH~2 Servo Assembly. ·
 ·CRUI~E COMMAND i.l H~3

Electronic .Regulator . ·. ,.. .·. ·, , : · ; compar<J.tor reference voltage (set speed minusl/4 mph
· . · · . ., . or 0.4 km/h) the cliarge·valvEfsolenoid is energized; the
( ) · Th~ electrop.lc ..r~gulat.or !sa. sealed black box that · .:·• vidve operis ~nd the diaphragm m~ves'to pull the chain
·- / contal}1& S!;JVeral ~le~tromc. ctrcmts. · . ., •' · · ·. ·. · · _.,,. , · and throttle cable, and the throttle IS opened further. As
The speed sensor, ,drivel). by ~he.fi~Pfl.edometer cable, is · the .throttle moves a throttle-position sensor (paten-.
a tach-generator that functioris af! the' squrce for the .~· iiometer) ·i~~ide ·th~ se~~o is activated to provide feed-
vehicle speed analog ·voltage. TheAC:-\r<)ltage gen~rated ·.· .: . back voltage·to 'both comparator circuits. Without it, the
by ·the senf;ipr,,is_ applied. to_ th~ !t~Plifier section of the , . /;.throttle wquld.continue ;to be opened.furtherthan neces-
regu,lator,' which amplifies and shapes it. The amplified ,... sary to ·inaintai~· the set speed .. The throttle-position
voltage signal is further modined'by·t~e frequency,..to.- '.; :potent1ometer'feedb~ck voltage eliminates the error
DC convert~r, w,hich transforms tllev~nab;le AC voltage_.,+ .. voltage.J?y.in~reasing.:tJw DC voltage applied to the com-
into a DC voltage· 'that is· proportiona,l t? the vehicle .. ~ parator Circuits,_ :When this voltage is increased to an
.. speed. . _...,•. (... , ......- _···.·. . : . ;, . ·. ,·,:.: ·.. ·: :~. ~· > a~plitq<ie,thatAs· bet'r.een .the ~ig? and low; reference
.· The DC voltage 1s ~pphed to four c1rcmts 1.n the ;eg~- :, . ,vol~ages;,_th.~ ~h,.ftrge valve :solenOid IS deene.rgized (valv.e
lator for further actwn. ThE)) ow., BP1eed sw1tch_em;u!t ,. ··' closed) and the throttle is, maintained in Jts new post-
compares· the'am·plitude of the DC'volti.tge.with a refer.::) . '~ ·.tion. In this ~ariner;. changes in throttle. position are
ence voltage that is equivalent to 30 mph {48 km/h). _Jf ···proportional' to the amou.ht that. vehicle speed. differs
the DC voltage ·ampli_tude--is grel!.ter than the referenP.e .' ...;···frofiYthe set §peed. For over-speed; ~bhd.itions (~uch as
ypltage am~litude, the .engage/cresume/accelerate cir- descending a>·nill); the operation is sinii1ar;.·except the
cuit of the system is activated. ~he,yehicle speed DC ...high con:wa:r.at,or:~irc\lit arid·ventvalve are involved. The
voltage' is also applied tothe hi'gh and loW: comparator high compa:rat¢:r circuit d!i!tectsthe DG.vo.ltage ampli-

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circuits arid to the memory circu'it;· . · · · . ·' tlide'increa~e'(~rror voltag~) from the.DC conv.ert~r -and
When the SET pushbutton is depressed~ the memory · deenerg1zes' tlie,vimt valve;;.so1ehoid (valvl'l open!,. a.dipit-
circuit sto~es the amplitUde ·of the D.C· vol,tage (eq~iva., · · •' th1g' atm6spheriC .vressu~e: The t.hrottl,~. begiris. t? close.
lent to vel:ucle speed) for future refere~g~. Two reference . T,he throttle. -~losing actlvf;ttes, the t)lr~ttle~positlo:n po-
voltages are produced: 'by the niemory~-Circriit, one repre- · ·' te~tiometer ~nd the f~'edback v6ltage ~1liMnates thE:) er-
sents the. ~et spe~d p)»~ J/4 !i:PP (0.4 krh/h) and the ) <. ror vo'ltage when lhe vtJhicle _spee¢ d~(}r~ase·~·-·to the set
/ other. represents the set speed ~in'us .l/4 mph <.0.4 speed and.:th~·v·oltage 'am~litude"to'the co~parator dr-
( ) km/h). Th,e r~~~r~nc~ plu~v?lta~e,Is ~p~~1~d to the ht~4. cu.it~ is .ag~.in q?twee.n_ the two speed reference voltage
· ""' comparator :circUit and the reference mmus voltage 1s· amplitudes: .., :. : : . , . . '.,-

applied to the low comparator circuit. . :: .. .. The -high.c ari&.low ¢omparator circqi,ts operate only
If the DG •voltage> amplitude from 'the. DC converter.. · wh~n the ~pg~ge(resumeAccelerate cir.~uit is activated.
(representing vehicle sp_eed) remains betw~en the r~fer~ . . This i~ accomplished by de·pressing the .SJ!lT pushbutton
ence plus and minus· voltage amplitudes, the regulator or by sliding the control swltch to the RESUME/ ACCEL
maintains the ch!lrge v,alye in, ~he closed iposit~o~. Jhe, ·\ <position. When,. the SET pushbu,tton ,'is·.depressed a;nd
vent valve is also main tamed m the close~ P.ositlo~. In released, the memory is updated ,to ,stor~. the ampljtude
this. condition, the throttle is maintained m a fixed ·of the presel).t vehicle !{peed volt~:~.ge. The engage/
position. " ,,;,: . . .. . ..., :·· . • t,:~· resurne/~<\riele:tate circujt;is ·deaetiv.ated.·by. depressing
the brake (or clutch pedal)<Vith m'iuiualtransrnission);or
NOTE: In their closed position, the charge valve sole-
by the vehfGle speed voltage decreasing to below ~he low
noid is deenergized and the. vent valve solenoid is
speed reference voltage (30 mph or 48 k.m/h). . · '
energized. ., .. ;-; .
...- ,. . . .._.. ·:::

Wlienever aroad h'rclin:e'is-·encoti-ntered, vehicle speed· DIAGNOSIS '"·'· ..

decreases, speed sensor output decreases:: and the DC . ·.,To di~g~oseCruise . Corhmand syst~m- malfunctions,
voltage amplitude froiD. t.he pQ.conve:r:ter a)so decreases refer to the Service Diagnosis Chart and Testing. .
a proportional amount. This creates an error voltage Refer to Cb~pt~r 3C-Instrument Panels and Com-.
that will be detected within the :low ct>nip~rator circuit. ·ponents .for detaili\ 'of speedometer cable and gear
When·..the- amplitude of this.volt~g~ drops below
~. ·' . . the
.
l,ow . r.epl_ac.ernept,, ~ ...
·:··.·
Service Diagnosis '.
.....

Condition Possible Cause ... .... Correction

.
~.,
·'·

:() SYSTEM DOES NOT,.

ENGAGE IN"ON''· ·:
.• (1)" Restricted vacuum hose or'no.
vacuum.
. ~1) Locate restriction or air leak
and repair. ··
POSITION
(2). Control switc)l defective. · ::(2) Replace switch.
80693A

[____ .. ____ --
·1 H..'4 .CRUISE: COMMAND

;;•. · ...
Service· Diagnosis (Cont'd,)
: ,-!: __ ·, . ,_ . ~ . . .- ~ i
,, Possible Cause · ' · '· ' Correction

· (~) '·lteplac~ te~~ator: . . '

•.
(3) Regulator d~lecti\ie.
i)' ..
•, · ., ' ·, 1 · ' I• l: ·'

( 4).. ·Sp~ed s.epso~ defe,ctive. ,,~ . . . · -(4) ..Replace:;sensor. ,.

(5)'; BrakEdamps defective. . . ·(i>) ' Repla~ brake lamp bulbs.
.. :··
(6) Brake light -~~itch defective, · (6)·:·Replace switch.
(7') Brak~'light'switeh wire,;i.. :., ''. ' ' ·(7) .~ .tOJ,l~ecfWlre't~ swiu;h.' ·. ..· . .• · : ' I .
·disconnected. · ·· "·
' ( 8) Open circUit between brake iigh,t · , .! ( 6) . ;t,t~pair :QP,~~ cir,cu,it.: . .
.. -,:.. ·. . . ' switchr~rid. brake lamps. :.· ·.·. ; ... ' . ~ . • ( ~ I . ·. •. . ' ... •

• (9)' 'Mecluini~81 \;ent vhlve pqsition , ;· _. ,;-_;··(~). ~·:.tdju~~.

i ..:.
v~n:~ val'Y~
•,: . ' ' . .. ,.
position~
'·. ' ·.
.., ....
. <, . . 'Improperly adjUSted, ·, l 1
t, !-~-\ ·..• . . . ~ :~. ~··! ,J ·: ' ••. ' . : ;,'·i ~~~~-~-;~-~-~··!~·:,·',.~ t-

RESUME-·FEATURE. ., (1) l)ef~tive e~vO, iground ·· ·· · · ·• • (1} Cheek servo ground wire
iNOPJ,llR~'J;'~\(~ . ,. , . · cQjffi~tiol\· . . ·connection and repair as necessary.
'~· · (2) · :co'htroi switch ~efective .. (2) Replace switch. ·

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ACCELERAtE~ ·... ·(1) A~ciel.erate circuit: in regulator ( 1) Replace Regulator ·
FUNCTION ~ ;_ ' .,
,,·,
iri<>p_e~8tive~ :. · ·
·, . .
,_ . ; .: '

INOPERATIVE (2.). pontrq\ Switchl)efective •. '. ( 2) Replace:Switch .·

SYSTEM RE:E·NGAGES ,;_H) :R~~at~r <fe:fectiye.
• l .. . . \ ~ .. . .
.,dl Replac~ ,regul~tor. ' ··
WHEN BRAKE (OR .i l l , . i . . .: • :.··· ) .

·.: .(2) • Adjust position or··~place valve.

CLUTCH)' PEDAL IS .· . ,. (2) ·., Mechanical v.elit valve nbt .
RELEASED . op.erQn;g. '· ,. , '· ,.·:

.. '~ .. ~ ! '. . : . f' ·.~. • ·' ...·

· '.: :( 3) Kink m nieeham<!al vent valve (3) ~route hose ~ r~moye iqnk.
hose. ,. :, . ;,, . . :··, "· .. ·.
· (4) Brake Hght, or clutch switch , ·(4) · ,Adjust ·<>r replace switcb:.
defective. · · ·
CARBURETOR , . (l( IlnprdJ)~r·Unkage adjus~~ent.·. ,-(1). Adjust properly.
THROTTLE . •'
DOES NOT RETuRN ;(2) Improper chain adjustment. ·· (2) Adjust chain. ·
• :.. I

TO IDLE POSITION
',! .....
ROAD SPEED CHANGES ·' (1) Centering adjustment set wrong. (1) Adjust centering screw.
MORETHAN.2MPH
(3.2 ~mlh) WHEN .
SETTING SP~EQ
ENGINE (1) No slack in bead chain. (1) Adjust chain.
ACCELERATES ( 2) Vacuum hose e6itnections. ,(~).: Gheck.connection and correct.
WHEN STARTED reveJ;sefjl :at servo.
. (3)" Servo defective. (3) ·· Replace servo.
'· 'il

SYSTEM DISENGAGES·.· (1) Loose wire connection. U) Repair connection\

ON LEVEL ROAD (2) Loose \racuuiii hose connection. (2) Check vacuum hose connection ·
WITHOUT APPLYING and repair as necessary.
BRAKE (OR CLUTCH)
(3) Servo linkage broken. (3) Repair linkage.
(4) Defective brake light or clutch (1) Repair connection.
switch. · · ·
ERRATIC (.1) Reverse polarity. (l), CheCk position of speed.sensor
OPERATION wires a.t connector..
(2) Servo defective. (2) Replace servo.
."I .·
(3). Regulator defective', (3) Replace regulator. 806938
 CRUISE COMMAND lH-5

_Servic_e Diagnosis (Cont'd.)

Condition PossiblE! Cause Correction ,
) '•:•\
/ VEHICLE CON.TINUES · . (1) ··Servo. defective.. '(1) ~epl;:J.ce, servo ..
TO ACCELERATE '> . .
WHEN SET BUTTQNJS . .(2('Regulatot
' : . ·. :::-
defective.
_, ~ " - ' -- - -
(2) Replace' regiilator.
RELEASEP ,. . ·. :·.._-.
.;
,·_,-,_
' : '· ·t~ ' . - :

SYSTEM ENGAGES ( 1) Air leak at vac),i1,1IJ;l hose .(f) · Cherik.ho~es al)d ~oPll,ection~:~. ·
BUT SLOWLY, LOSES . ,... ,; _COIUlections or in hoses. · · Repair ·as necessary.···. · :
SET SPEED '" ·
Airleak afvent valve on brake or. ,. (2f R~place vent . v~lve, . ,.
..
~ ' '
· clutch pedal. . , · ·

TESTING. . Control Switch Continuity Test

Perform ·the following tests ·a;k' patt ·ot th~· service use ~ 12-volt test la~v· to test' control ~~itch co~tinu­
diagnosis to determine the cause of a malfunction and ity. Connect the tester to the wires as indicated in the
the correction required. Control Switch Test illustration (fig. lH-3).

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'J'. ,_ ; .

. {_:•
. ~

y Y· G B R

dI 0
I
0
I
I I I
NO YEs YES
I I
I
~----SOURCE
12V' I
' I
,.I ·.12 v
(BATTERY) ',I,." SOURCE
(BA.T.TERYI

· CONTROL SWITCH IN RESUME/ACCELERATE POSITION .. SET PUSHBUTTON DEPRESSED

y G B R

.0
. '.I .
0I 0I 0I
I •',• ';. I I I
YES YES NO YES
. I I
I I I ... I
~ I ,. 12V I, I ,. 12V
~----SOURCE·: ~----SOURCE
,.
" ' .... I . ,. ........... ,. ,. ·.
(BATTERY)
(BATTI;:RYI

Fig~· 1H-3 ·Control Switch Test 80694

1H·6 CRUISE COMMAND

•.-:' ,.
Circuitry Tests · (2) Connect voltmeter set on low AC scale to speed
. sensor.wire connector terminals. . :· , '
Perform the followihg tests as part onthe service
(3) Raise front and rear wheels of vehicle off ground
diagnosis to determine the ~au!;le 'and correction of a, and support vehicle with jack stands: · : · ·· '
Cruise Command systeni' malfunction. Refer to figure
. (4) Ope~at~ engine. (wheels ~pinning fre~ly) at 30
1H~4 for the wiring diagram. ·
mph (48 km/h) and note ,voltage. Voltage shou.ld be
Regulator Wire Harness Connector approximately 0.9 volt. Increases of 0.1 volt per each 10
(1).D~s.~onnect wire harness connector at regulator. mph (16 km/h) increase in speed should also be
ihdicated. · ' •· · · · :· ·· ,
Use smtable thin tool to depress· tab inside hole on regu~ ·
lator identified by'"Terminal Release." (5) Turn off engine and slowly haltwh~els .. '·
(2) Verify that each wire is installed in correct loca· (6) Disconnectvoltmeter. · ·
tion~a<;'cording to color. Refer to figures 1H~4 and 1H~5. (7) Replace speed sensor if defective. Refer to Chap~
Speed Sensor Test · · · · · ter 3C: ·. · ·.· · · · · ··· ·. · ' · ·
(8) Connect speed sensor wire harness connector.
(1). Disconnect speed sensor wire harness connector. (9) Remove jack st~J,nds .-. and lower
,. ,, vehicle
·..
.

SPEED FROM ACCESSORY

DASH TERMINAL ON FUSE
SENSOR PANEL PANEL
GROMMET

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r---------~--~--~LT.GREEN---4~
[JJJ-BLACK ~------44~-------+~----------~~--~GREY-----4~ 2
~BLACK 1---------+<~-------t+-----__:........__~..:.._- DK. BLUE -----1-e 3
4
r--+-""--- BROWN - - + e 5 a:
r----+--1----_._,
.. ·.WHITE ----+-e 6 0
1-
BROWNW/TR 7 <1:
..J
·NOTUSED e 8 ::J
._,NOT USED • 9 tll
.-----~YELLOW--+- ' ::!

DASH
PANEL
GROMMET

~
0
w
a:
SERVO

4AMP
IN-LINE
FUSE
,• CONTROL
CLUTCH SWITCH
SWITCH
(MANUAL
TRANSMISSION 1-4--4...1
ONLY)
BATTERY ~PINK-----+< ~-f-,~·

LAMP
TO SWITCH
BRAKE LAMPS ~-----BLUE----1-< ~+--.__.
806968

Fig. 1H-4 Cruise Command Wiring Diagram

 CRUISE- COMMAND 1H· 7

Perform the five tests listed in the Cruise Command

Diagnosis Chart for arapid diagnosis of the Cruise Com-
~I mand System. .

· Tester AM-PC·l·R
The tester lamps are associated with the following •
.cQ_fhponents, circuits, etc. ·
·-,, . - ~Lamp 1""--'-Power source, fuse and ground, and ON~
OFF and SET-SPEED contacts in control switch.
• Lamp 2--::'Speed sensor, a~sociated wiring harness
and ter.rrifrials and connectors. .· · · . · · . : ,
• Lamp. 6-,-Servo charge valve so_lenoid, RESIJME/
' ACCEL contacts in control switch, and associ'ated
-... wiring harness, terminals and connecto:r-s.
Fig. 1H-5 Harness Connector at Reguulator
· ~Lamp 4-Throttle position potentiometer (feedback
voltage), and associated wiring· harness, terminals
Cruise Command System Test ·
and connectors. · ··· ·
· A Cruise Command System test can be quickly and • Lamp 5.d..Servo vent valv~ solenoid, RESUME/AC·

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accurately performed with the Cruise Command Tester CEL contacts in the control switch, and associated
(AM-PC-1-R). wiring h·arnes·s, terminals and connectors.
(1) Remove wire harness connector from regulator. · • Lamp 37 B,rake or clutch pedal switch adjustment,
(2) Connect CruiseCommand System Tester to wire and ass6ciated ·wiring harness,. terminals and
harness connector. · . connectors.
Cruise Command Diagnosis Chart
''

~··
) ' TEST AND' TEST LAMP "' CHECK-REPAIR
CONDITIONS RESULTS
( 1)

, : Test for Correct Power Source ·All Lamps Off None

Connection
.. ,. ·,·.
One or More Lamps On -~
.,
Remove browh wire (5) at regulator connector .
Ignition Switch-Off . from-direct source of voltage or repair defective
Control Switch-Off
(2)
\-.
'
'.· ... '
control switch:•·

Test for System Electrical Lamps 1; 2; 3, &:4 On, None i'

· Continuity Lamps 5 & 6 Off

. . Ignition Switch-On Lamp 1 Off Check for blown fuse in brake light switch to
. Control Switch-On control switch circuit.
Check red, brown'& green wires at control switch
connector for continuity to switch; . '

•'
Check dark green 'wire· (14) at r~~ul~~or connector
. for continuity to regulator.

Lamp 2 Off .. ···

Q.~eck speed sen~or for correct output voltage: ..
'

. Check grey &.dark blue wire at speed sensor

connc;lqtor for continuity to regulator connector.

'•
Check. terminals 2, 3, 5 & 7 at regulator connector I·
for proper connection to wires.
'-

Lamp 3 Off Check brake light (and clutch, if equipped) switch

,. adjustmc;lnt. '
' Check brown, light blue & dark green wire
., 'connections for continuity between connectors .
I
90799A

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lWB CRUISE :COMMANIJ;

, Crui$e Command Diagnosis Chart (con~i_nued)

.,

TEST AND
.•
T:ES.TLAMP ·. C.HECK-REPAIR
CONDITIONS RESULTS
1--·

Lamp4 Off Check for-detective connection at terminals 2 &

11 on regulator connector.
c.
Check operation of throttle position feedback
I potentiometer on servo.
(3)
,.
Test for Servo Ch_arge Valve Lamp 2,3, 4, 5 & 6 On None
Solenoid Continuity Lamp 1 Off ',''

.. Ignition Switch-On
.· Control Switch -'- On Lan1p4will dim when servo
'.
moves throttle to wide open
Set Speed Switch·_ Depressed position with engine operating. .;.

WARNING: If engine is operating, Lamp 2 Off· Refer to Test 2, Lamp 2 Off.

servo will move throttle to wide
open position. Lamp 30ff Refer to Test 2, Lamp 3 Off.

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'
Lamp4 Off Refer to Test 2, Lamp 4 Off.

Lamp 5 Off Check for defective connections at terminals 6 & 12

on regulator connector. . '
'
Replace defective servo .
..
Lamp 6 Off · . Check for defective connection.at terminals 4 & 12
on regulator connector.

Replace defective servo .

..
·.
AIHamps Off after depressing set Check,for blown fuse .
. speed. switch ·or moving control
Check for short circuits in red, pink & brown wire
switchto resume/acceleration
circui~s ~t control switc[l ...
position.
Replace defective servo .
..
. '

..

(4) '.···

Test for System Disengagement Lamps 1, 2 & 4 On . None

..
with Brake or Clutch Pedal
. ····'
'.
Depressed r
· Lamps 3, 5 &'6 Off
·Ignition Switch-On
Control Switch- On Lamp 3 On when brake or clutch
Brake Pedal
.
Depressed. ' pedal is released.

Lamp 1 Off Refer to Test 2, Lamp 1 Off.

i
·Lamp 2 Off Refer to Test 2, Lamp 2 Off.

,, l,.amp4 Off Refer.to.iest 2, Lamp 4 Off.

Lamp '3 Off when brake or clutch Refer to Test 2, Lamp 3 Off.
'pedalls released. ·

907998
 . CRUISE COMMAND . 1H~9-.

· Cruise CQmmand Diagnosis Chart (continued)

TEST· AND .. . '

..
TEST LAMP ~HECK-REPAiR·.
..
CONDITIONS RESULTS.
(5):.
'·
Test Resume/Acceleration ' . All Lamps·On None '
< ' ..
Function of Control Switch " ··:·
"
Lamp 4 will dim when servo ' ..
'
Ignition Switch-On moves throttle to wide open
Control Switch- On position with engine' operating.
., ., .,
Refer to Test 2, Lamp 1 Off.
,.
Move control switch to .,. Lamp 1 Off ·
..
resume I acceleration pof!lition. - ~. ,:
. '

Lamp 2 Off Refer to Test 2, Lamp 2 Off.

WARNING: If engine Is operating,
servo will move throttle to wide Lamp 3 Off .' Refer to Test 2, Lamp 3 Off.
ppen position. ,.
. L~mp 4 Off Refer to Test 2, Lamp 4 Off. ·.·.

LampS Off ' :.:

Refer to Test 3, LllmP·~·Off: . '. ~
,, '·

.. ·•
.
,. Lamp 6 Off Refer to Test 3, Lamp 6 Off.
I

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.. . .• ·
' .. ' . . '· .
All Lamps Off .. Refer to Test 3; All Larnps.Off.
•'
..·.
907990
' .:

ADJUSTMENTS Vacuum (Mechanical) Vo.nl Valvo' : ·

(1) Depress brake or clutch pedal and hold .~n
(~) Centering Adjustment depressed position. · '
.
(~) Move vacuum vent valve~ toward. bracket on
''' ' '

Adjustment is made by turning the centering adjust:" .

pedal as far as possible. ·
mentscrew on the regul~tor (fig. 1H-6).
'.; (3) Release brake-or clutch. pedal, ..·
... · ,:·... :

REGULATOR REPLACEMENT
The regulator is mounted on a bracket uiider the in-
strument panel near the headlamp switch. Remove·
screws and disco·nnect connector. ·Insert: suitable thin
tool to depress tab inside hole on regulator identified by' ·
"Terminal Release." To install, insert connector iptO
regulator and install screws. ·
•• !;
; . '~ ".

'.i·
SERVO REPLACEMENT
Fig. 1H-6 Centering Adjustment Screw Location Removal
. If the-speed control engages at two or more mph.(3.2 (1) Remove retaining nuts and cable h~using ftoin
or ·more. km/h) higher than the selected vehicle speed, , servo. · '· !,.'·
turn the centering adjusting screw counterclockwise a (2) Spread clip conn~cting. cable to servo and
remove. · . · ·· · · · · · · ., · · ·. · ·
small amount. If engagement speed is two or more mph
(3:.2 or more km/h) below selected speed, turn the cen- (3) Disconnect vacuum hoses from servo.· · 1
.--J·. teririg adjusting· screw ~lockwise a smallamount (fig. (4) Remove retaining.nlJ.t and servo from bracket .
- 1H-6). . ' ' . . Note position of ground cable. '
· (5) Disconnect· wire harness connector under in-
·NOTE: Gheck for proper centering adjustment on a strument panel. Carefully maneuver harness through
level road after each adjustment. dash panel and remove servo.
 Installation . CONTROL SWITCH REPLACEMENT
(1) Attach S\'lrvo ~M riut to bracket Tighten with 60
inch-pounds (7 N•m) torque. Ensure ground cable is The 1Crllise Command' control switch is. integral with
positioned on stua. the turn signal switch -lever. The switchjis not repair-
(2) Maneuver wire harness through dash :panel and able. The switch 'and wh·e harness ~&sem.bly .can be re- · .
connect connector. placed only as a complete unit. ,.
(3) Install cable on servo and squeeze clip to retain
.'
cable. Removal ,
N:OTE: Mounting studs ar:e not. equally spaced from (1) Remove following items.
hole in servo; Ensure housing is installed correctly. (a) Horn button insert
(b) Steeringwheel
(4) · Connecfvacuuin hoses. (c) Anti~theftcover
(d) Locking plate and horn c~mtact
(2) Remove turn signal switch lever and control'
SERVO CHAIN RE,PLACE.I.VIE_NT · switch assembly (allow handle to hang loose outside·
(5) Open tabs retaining servo cable. steering column).
(6) Disconnect ·chain from bellcrimk pin. Remove (3) Remove four-way flasher knob.
chain. ·

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._ (7) Attach replacement chain to servo cable, allow- (4) · Remove holddown screws and turn signal·
ing seven beads outside tabs. Squeeze tabs together. switch.
(8). Connect replacen1ent chain to bell crank pin. (5) Remove trim piece from under steering column.
(6) Disconnect four-wire connector .
. SERVO CABLE REPLACEMENT (7) Tilt Column- Remove wires from plastic con-
nector. Fold back and tape two of four wires ~ire to
harness. Tie or tape string to wire harness.,
Removal'
(8) Standard Column-Tie or tape string to plastic
(1)· Remove clip front pin on bellcrank and remove
connector.:-·
chain. ·
(2) Squeeze tabs that retain cable housing in (9) Remove lever and wire harness assembly fro~·
bracket and remove cable from bracket. column.
(3) Remove retaining nuts an4 cable housing from.
servo.
(4) Spread Glip that connects cable to servo and Installation
rem0ve . (1) Test ''repla~eru,ent
Cruise Comiliand control·
(5) Spread tabs on chain end of cable and remove
switchJ:>y connecting to wire harness connector before
chain. · , installing in steering colump. Refer to Conth)I Switch
Continuity Test.
Installation
(1) Connect chain to cable and squeeze tabs. Allow NOTE: When installing, the . wire harness must be
seven beads to remain outside cable tab. routed through the turn signal switch 'lever opening
becau.se the handle will not fit through the lever
NOTE: Beads must be free to rotate. opening.
·,l'

(2) Attach cable to servo and squeeze clip to retain

cable.-·· . .. , (2) Remove wires from connector. Fold back and
(3) Install cable housing on servo. tape' two of four wires to wire harness. Tie or tape wire
harness to string that was attached. to original wire
NOTE:' Mounting 'studs are. not equally spaced from ... harness before removal.
hole in servo. JJJ.ns'lfir"_f hous~ng is ins ta,lled correctly.
(3) Pull replacement· wire harness down through
(4) -Attach .cable housing to bracket. Ensure tabs steedng column. On tilt. column, harness _,must pass
are locked in bracket. through hole on left side of steering shaft.
(5) Place chain 'On bellcrank pin and install lock clip.
Seven beads must :be visible between bellcrank lock clip. NOTE: 1t may be necessary to loosen steering column
and cable clip. mounting screws for easier routing of harness.
 CRUISE COMMAND . 1H-l1 - . -~:jl

(4) Iris fall turn signal switch and four-way flasher anti-theft cove.r.
knob.
(7) Install steering wheel and horn button insert.
(5) Install turn signal switch lever and control
switch assembly. (8) Install trim on steering column.
(6) Install horn contact, locking plate and lock ring (9) Test Cruise Command operation.

Tools ,_;.

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J-21008
CONTINUITY AM PC-1-R
TEST LAMP

.•': .·-.
 NOTES

r··
''

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