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SECTION 06A: H3 SERIES ELECTRICAL

PA1621 Maintenance Manual All Series | January 2017

3. ELECTRICAL COMPARTMENTS

FIGURE 4: ELECTRICAL COMPARTMENTS

3.1 MAINTENANCE

A corrosion inhibitor has been sprayed on

certain electrical components in order to protect

them from corrosion. Refer to procedure

SAV00002E at the end of this section for

recommended products and where they are

used.

DANGER

Use sprayed sealer in a well ventilated area.

Do not smoke. Avoid prolonged contact with

skin and breathing of spray mist.

CAUTION

Never put grease or other product on the

multiplex modules connector terminals.

3.2 MAIN POWER COMPARTMENT

The main power compartment is located on rear

R.H. side of vehicle behind the rear

wheelhousing. This compartment contains the

following components (Figure 5 & Figure 6):

 Four 12-volt batteries;

 Main circuit breakers for 12-volt and 24-volt

electrical system;

 Voltage regulator (if applicable);Battery

equalizer;

 Battery Charger (optional);

 Battery master relay (R1) & battery master

switch;

 TCM (Transmission Control Module);

 Secondary circuit breakers;

 Relays;

 Rear fuse box known as VECR (Vehicle

Electrical Center Rear);

 Multiplex modules: I/O-A, I/O-B;

PREVOST H3-41 Maintenance Manual

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