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Electrical
12-Volt System
The major portion of electrical power in your Airstream
is 12 volt� The 12-volt current powers almost everything
except the roof A/C, 120-volt receptacles, microwave
oven, and the boiler for the heating system� However,
some of these appliances have 12-volt electronic
boards�
All 12-volt current is routed to a 12-volt fuse block
located behind a panel under the curbside lounge seat�
The fuse block is the hub of the 12-volt system, tying
together the inverter/charger and house batteries�
Power from the fuse block goes to a buss bar with six
breaker positions holding Type 2 thermal breakers�
Five of the thermal breakers feed the tank heater pads,
all roof lights (except for those on the awning), house
radio power (along with house battery heaters and an
optional router), waste hose reel and dump valves,
and the house battery disconnect� The sixth thermal
breaker is fed by the house solar controller, providing
some supplemental power under ideal weather
conditions�
Power is routed from the battery disconnect to the 12-
volt distribution panel and through its branch circuits to
the rest of the touring coach�
CAUTION
Thermal breakers break contact when overheated
by a short or overload in the wiring. These
breakers automatically reset when cooled down.
A breaker continually overheating and breaking
contact should be investigated by a qualified
service technician.
12-Volt Operation
The only thing you have to do is make sure the house
batteries do not run down� This should not be an issue
if you are plugged into an external AC power source
at night or when camping� When you're plugged
into shoreline power, or running the generator, the
converter charges the batteries and carries much of the
load�
Some nights you may not find a place to plug into city
power� This should not be a problem as well; you can
continuously run your interior lights, water pump, and
vents for about 8 hours on a full charge� However,
you should monitor your battery voltage and start the
generator, if needed� Fully charged house batteries
will provide approximately 8 hours of moderate 12-volt
2022 Interstate 24X
usage� If the inverter is being used extensively the
house batteries will be depleted much quicker�
If you are not plugged into city power, and you plan
on staying longer than a day or two, you will want to
conserve your batteries by using as few lights and
appliances as possible� Check the monitor system
regularly� It's much easier on the batteries if you start
the generator or run the chassis engine before the
batteries run down� The generator starts from the
house batteries so it must be started before they are
depleted� If the house batteries become depleted, the
chassis engine can be started to charge them� It could
take a few minutes before the house batteries are
charged enough to start the generator�
The engine battery and house batteries are isolated
from each other by a DC-DC converter, preventing the
two systems from drawing down simultaneously�
Ceiling and Directional Lighting
All lighting in the touring coach is LED and most
will require a replacement fixture should it go out or
malfunction� Some lighting will be operated from a
rocker switch located under the galley roof locker�
This switch will operate the water pump, accent lights,
galley lights, and the wet bath light� A rocker switch at
the rear of the lounge, operates the exterior docking
lights� A push light is located above the table, behind
the driver's seat and adjustable, push button lights with
integrated USB ports, can be found above the rear
lounge seats� The main ceiling lights can be adjusted
using the dimmer control switch at the end of the
galley�
Entry Door Switches
The two main switch panels on the end of the galley, at
the main entry door, operate the interior ceiling lights
and exterior lighting�
NOTE
The battery disconnect switch must be ON for all
switches to operate.
Interior
5-7
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