SECTION 6 –
ELECTRICAL
6-8
BATTERY INFORMATION
Chassis Batteries
The chassis batteries operate the engine starter
and all automotive accessories and controls
found on the instrument panel. The leveling
jacks, slideout room system, and the electric step
are also connected to the chassis battery.
The battery Isolation Manager (BIM)
monitors the Battery Voltage of both the Chassis
and Coach Batteries over long periods of time. If
it senses a charging voltage, it connects the two
batteries together. If the charging system is
overburdened, the batteries will be isolated,
however, if the BIM sees a long term charging of
both batteries it will allow the batteries to remain
connected and allow the charging system to do its
job. Once the batteries have reached a Float
Charge state for one hour, the BIM will isolate
the batteries to prevent overcharging, and will
only reconnect the batteries for charging if one of
the Battery drops to approximately 80% charge,
and the other is being charged. If the batteries are
not being charged, BIM isolates the two batteries
to prevent an electrical draw in one system from
depleting the other battery.
If the house batteries are not being charged,
the chassis batteries will be isolated to prevent an
electrical draw on the house batteries from
depleting the chassis batteries.
House Batteries
The house batteries supply current to 12-volt
equipment located in the living area of the
motorhome. This includes interior lights, range
exhaust fan, water pump, water level and holding
tank gauges, 120-volt generator starter,
refrigerator, and bath roof vent fan. The house
battery may also be used to start the engine if the
automotive battery is discharged. (See “House/
Coach Battery Disconnect switch” or “Battery
Boost switch” in
Section 3 - Driving Your
Motorhome
).
The house batteries are automatically charged
by the chassis alternator while the engine is
running.
HOUSE/COACH BATTERY
DISCONNECT SWITCH
(COACH BATT)
The House/Coach Battery Disconnect switch
lets you disconnect the house batteries from the
12-volt system of your motorhome during
storage periods to avoid battery drain by
electrical items that are hooked directly to the
house batteries, such as clock displays and radio
memories, etc.
Always leave this switch ON while using the
motorhome.
NOTE: Some electronic displays and memory
functions may need to be reset after
power has been reconnected.
See also “Battery Care” elsewhere in this
section.
BATTERY ACCESS
House/Coach Batteries
The house/coach batteries are located behind
the rear passenger side exterior door.
House/Coach Battery Disconnect Switch
(Located near entrance door)
-Typical View
