Holiday Navigator 2003 Owner's Manual page 364

Electrical Systems - Chassis
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BATT BOOST:
The Battery Boost switch is used in the event the motorhome chassis battery
has been drained or is at a low charge level where the engine will not start.
This switch momentarily "jumps" the house batteries to the chassis batteries to
assist in starting the engine.
To Use the Switch:
1. Hold the switch down for ten seconds. With the switch held down,
turn on the ignition key. The battery volt gauge on the dash should
indicate 12 Volts.
2. If voltage is sufficient continue to hold the switch down and try to
start the engine. If the engine does not start, or voltage is not sufficient,
the motorhome may require jump starting. See "Jump Starting."
NOTE: There should be an audible click from the engine compartment
when the solenoid engages.
CAUTION: The boost switch should not be held for more than 30
seconds. Damage to the boost solenoid may occur from overheating.
When the battery boost switch is pressed it will ground the 12 gauge
orange wire from the 1,000 Amp solenoid. A loud clicking noise should be
heard when the solenoid engages. If the boost solenoid is inactive, locate the
molex plug and start the troubleshooting process by removing the cover on the
dash. It may be necessary to remove the wire from the battery boost solenoid
and perform a continuity check from the front to the rear of the motorhome.
BATTERY CUTOFF:
Turns house battery power on to 12 Volt domestic fuse panels.
BLOCK HEAT:
This feature warms the engine for starting in sub-freezing or extreme cold
temperature. Turning the switch on supplies 120 Volt AC power to the receptacle
for the block heater cord. For efficiency, hook the motorhome to shore power
when using the block heater receptacle.
To Use the Block Heater:
• Hook to shore power and plug in block heater cord to the receptacle.
• Turn on the Block Heat switch.
NOTE: It is advised to prepare the engine for starting in sub-
freezing temperatures by leaving the block heater plugged in
overnight.
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