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Fig 1: Cooling Fan Circuit, Caterpillar

The document describes a cooling fan circuit for two different vehicles. For the Caterpillar vehicle, the circuit connects a bulkhead module and engine ECU to control a fan clutch switch and air manifold unit. For the MBE vehicle, the circuit connects a vehicle control unit to control a Corsair fan clutch and solenoid driven fans. Wiring allows for fan operation with or without an override switch. The grounding path is also shown.

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luis eduardo corzo enriquez
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949 views2 pages

Fig 1: Cooling Fan Circuit, Caterpillar

The document describes a cooling fan circuit for two different vehicles. For the Caterpillar vehicle, the circuit connects a bulkhead module and engine ECU to control a fan clutch switch and air manifold unit. For the MBE vehicle, the circuit connects a vehicle control unit to control a Corsair fan clutch and solenoid driven fans. Wiring allows for fan operation with or without an override switch. The grounding path is also shown.

Uploaded by

luis eduardo corzo enriquez
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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COOLING FAN

Fig 1: Cooling Fan Circuit, Caterpillar

HOT AT
ALL TIMES
POWER
DISTRIBUTION
MODULE

G
BLK
14H
RED
81C PNK 9

LEFT FRONTWALL GND BLK 6


D INTERIOR GND

IGNITION POWER
SPLICEPACK
D RED 14H
B3 A

G PNK 81C
B5
BULKHEAD MODULE GND BLK 2B

W/ FAN BLK GND 149 PPL 1


OVERRIDE
SWITCH
F BLK GND
INTERIOR 29A BRN 10
W/O FAN LIGHTS
M BLK GND OVERRIDE SYSTEM
SWITCH FAN CLUTCH SWITCH
GND
BLK

PPL
149

GROUND DASH
SPLICEPACK SP9
GND
BLK

W/O FAN W/ FAN


OVERRIDE OVERRIDE
SWITCH SWITCH
LEFT FRONTWALL
INTERIOR GND 149 PPL
(OR GND) (OR BLK) F
11 PPL 440Z
149D PPL E
41 GRY 440Y

AIR MANIFOLD UNIT


5 BLK 440G
A
ENGINE ECU
B
A BLK 440G
149D PPL D
B GRY 440Y
440Z PPL C

A/C STATUS
FAN CLUTCH SWITCH
AIR MANIFOLD UNIT
206391
Fig 2: Cooling Fan Circuit, MBE

HOT AT
ALL TIMES
POWER
DISTRIBUTION
MODULE

G
14H BLK
RED
81C PNK 9
D
IGNITION POWER
SPLICEPACK

LEFT FRONTWALL GND BLK 6


A INTERIOR GND
D RED 14H
B3
G PNK 81C
B5
BULKHEAD MODULE 149B PPL 3

LEFT FRONTWALL 440G BLK 2B


INTERIOR GND
15 PPL 149B

14 GRY 440Y
INTERIOR 29A BRN 10
W/ FAN
LIGHTS
VEHICLE OVERRIDE
SYSTEM
CONTROL UNIT SWITCH FAN CLUTCH SWITCH

NCA

W/ SOLENOID
B GRY 440Y DRIVEN FANS
NCA
A BLK 440G NCA 1

CORSAIR FAN CLUTCH


A/C STATUS
NCA 3

BLK/WHT GND 440Z PPL C


W/O
SOLENOID
DRIVEN
FANS 149 PPL D
BATTERY
GROUND
B
MATING
CONNECTOR FOR A
MBE SUPPLIED
HARNESS
FAN CLUTCH SWITCH
AIR MANIFOLD UNIT

206392

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