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Old 12-02-2015, 11:50 AM   #1
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Alpenlite truck light cord

I have a 2002 32' alpenlite and wondered if the pigtail going to the truck has a power line for the camper other than the lights .I have no diagram of the trailers cord . I'd like to run the gas furnace using the truck power without using the generator like at a rest area and don't want to run down the batteries . Any thoughts would be greatly appreciated .

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Old 12-02-2015, 03:41 PM   #2
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Does your trailer have a battery onboard? If it does you probably have a 12V charging line to keep the battery charged. Whether or not it would supply truck battery power without the engine running depends on how the truck wiring is configured. Often the truck mfgr installs a device in factory-installed trailer wiring to prevent the trailer from discharging the truck battery. In that case you cannot draw power from the truck battery while the truck is not running.
There is a way to run a jumper wire to accomplish what you want, but there may be unintended side-effects to the truck electronics.
IMO your best option is to install a 2nd trailer battery for overnight furnace use without totally discharging the present trailer battery and prematurely ending its lifespan.
This website may help understand your trailer to truck wiring
although it does not show a trailer battery, which would be connected to the 12V power wire:


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Old 12-03-2015, 10:12 AM   #3
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thank you. This helped , I got it .Works great . Now I can also use my 3 way frig .
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