Scribd
Upload
8K views6 pages

Service Bulletin Trucks: Fuse and Relay Center

This service bulletin from Mack Trucks provides information about fuse and relay locations on CLX, CMH, CMM, CSM, and CXX truck models. It identifies the locations of the Bussed Electrical Center (BEC), Engine Power Distribution Module (EPDM), Power Module Block, and Relay Centers. It also shows examples of fuse and relay positions in the dash-mounted panels and EPDM and provides instructions for replacing mini-fuses and relays.

Uploaded by

Andre Paul Mektronik
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
8K views6 pages

Service Bulletin Trucks: Fuse and Relay Center

This service bulletin from Mack Trucks provides information about fuse and relay locations on CLX, CMH, CMM, CSM, and CXX truck models. It identifies the locations of the Bussed Electrical Center (BEC), Engine Power Distribution Module (EPDM), Power Module Block, and Relay Centers. It also shows examples of fuse and relay positions in the dash-mounted panels and EPDM and provides instructions for replacing mini-fuses and relays.

Uploaded by

Andre Paul Mektronik
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
You are on page 1/ 6

Service Bulletin

Mack Trucks, Inc.


Milton, QLD, Australia Trucks
Date Group No. Release Page
11.2015 372 15 01 1(6)

Fuse and Relay Center


CLX, CMH, CMM, CSM, CXX

Fuse and Relay Center


Content
• “Fuse and Relay Locations”, page 2

• “Mini-fuse, Replacement”, page 6

• “Relay, Replacement”, page 6

PV776-89224504
USA73472 English
Mack Trucks, Inc. Date Group No. Release Page
Service Bulletin 11.2015 372 15 01 2(6)

Fuse and Relay Locations


The vehicle's instrumentation, gauges and other electri-
cally controlled parts are wired through the Bussed Electri-
cal Center (BEC), the Engine Power Distribution Module
(EPDM), the Power Module (PM) Block and Relay Centers
(RC1/RC2).

W3107828

EPDM Under Passenger Side of Dash, Near Left Kick


Panel
1 Engine Power Distribution Module (EPDM)

The EPDM is located under the passenger side of the


dash, near the left kick panel.

W3080460

BEC and PM Block Under Top Center Dash


1 Bussed Electrical Center (BEC)
2 PM Block

The BEC and PM Block are located under the top center
of the dash.
Mack Trucks, Inc. Date Group No. Release Page
Service Bulletin 11.2015 372 15 01 3(6)

W3080465

Relay Centers Located Behind Instrument Cluster


1 Relay Centers

There are relay centers that are mounted directly behind


the Instrument Cluster.
Mack Trucks, Inc. Date Group No. Release Page
Service Bulletin 11.2015 372 15 01 4(6)

Dash Mounted Fuse and Relay Positions


Note: EXAMPLE ONLY, refer to the decals inside of each
panel cover for vehicle's exact fuse descriptions and
ratings.

W3080608
Mack Trucks, Inc. Date Group No. Release Page
Service Bulletin 11.2015 372 15 01 5(6)

Note: EXAMPLE ONLY, refer to the decals inside of the


EPDM cover for vehicle's exact fuse descriptions and
ratings.

W3080610

EPDM Fuse and Relay Positions


Mack Trucks, Inc. Date Group No. Release Page
Service Bulletin 11.2015 372 15 01 6(6)

Mini-fuse, Replacement
You must read and understand the precautions and
guidelines in Service Information, group 30, “General
Safety Practices”, before performing this procedure. If
you are not properly trained and certified in this proce-
dure, ask your supervisor for training before you perform
it.

To replace mini-fuses in the truck electrical center, use on-


ly the fuse puller tool provided with the vehicle, 20378326.
Removing the mini-fuses with another device can possibly
damage the connections.

W3002525

Relay, Replacement
You must read and understand the precautions and
guidelines in Service Information, Function Group 30,
“General Safety Practices”, before performing this pro-
cedure. If you are not properly trained and certified in
this procedure, ask your supervisor for training before
you perform it.

To replace relays, use relay puller tool J-43244. This tool


can be used on standard size or micro-relays, power re-
lays, mini-circuit breakers, maxi-fuses, etc.

T3019610

You might also like