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12 VDC S
YSTEM
NOTE: If you experience an interruption in 12 VDC power, please check the 12
VDC Disconnect switch located in the entry well.
The 12 VDC coach system provides power for a variety of applications. Many coach
lights, fans, the water pump, and other coach accessories use 12 VDC. In addition, 12
VDC power is used to ignite the furnace, power its fans, and run the indicator lights in
the refrigerator and the Coach Monitor Panel. The 12 VDC system also can provide
temporary power for the 120 VAC appliances with use of the inverter.
The 12 VDC system is divided into two sections. The "chassis" section powers the engine,
running lights, and dash accessories. It includes the "chassis" batteries and alternator.
The "house" section powers the 12 VDC interior lighting, ceiling fans, refrigerator, furnace,
water heater, Coach Monitor Panel, radio, generator, and water pump.
This section includes the set of "house" batteries. It also provides power to the inverter.
A boost switch connects the two systems. This allows the house system to supplement the
chassis system and also prevents the chassis battery from being drained by house
demands. This is more fully discussed in the next section.
Chassis System
The chassis electrical system is enhanced by Safari in several ways. The system provides
power for starting the engine and also powers the leveler pump and generator. It is
recharged by the 30 Amp alternator and a 20 watt solar panel and protected by a 250
Amp fuse.
Solar Panel
The solar panel provides up to 20 watts of power during the daytime to assist in charging
the chassis and coach batteries. This helps to maintain the battery charge even when
parked for extended periods. This panel will produce a slight drain during the night. In
your coach, the drain is virtually immeasurable.
Trek Owner's Manual
6 ~ 79
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Troubleshooting
