ELECTRICAL SYSTEM - continued - TM-9-2320-391-100107

TM 9-2320-391-10

M1078A1 SERIES THEORY OF OPERATION -

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Continued

ELECTRICAL SYSTEM - Continued

Power Distribution (Vehicle S/N 100,001 to 199,999). The Power Distribution Panel

(PDP) is equipped with four Power Distribution Modules (PDM) used to control

12 VDC and 24 VDC power throughout the vehicle.

1. Each PDM has a separate cover that protects its electrical components.

2. All electrical circuits are protected against overloads by circuit breakers.

3. From the PDP, wiring harnesses and cable assemblies carry electrical current to

operate vehicle equipment and accessories. Most electrical equipment and

accessories are grounded directly to the vehicle chassis.

BRAKE SYSTEM

The vehicle is equipped with a brake system that complies with the Federal Motor Vehicle

Safety Standard (FMVSS) 121. The brake system is made up of an air compressor, air

dryer, primary and secondary air tanks, and several valves to control the application and

release of the brakes. An Anti-lock Braking System (ABS) is also provided. The ABS

monitors wheel speed at all times and prevents brake lock situations. An exhaust brake is

also installed to add driveline braking to the FMTV. This feature results in quicker, safer

stops and less brake lining wear than occurs in vehicles without an exhaust brake system

installed.

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