Hot wire from vehicle to charge battery

[firecatab]

I installed the furnace this weekend now wondering if it took the hot wire from the trailer plug in and ran it to the positive side of the battery in the trailer will it charge as I am travelling? Also what else do I need to do if that will work, run a ground to the battery from inside the trailer, do I need a isolator switch? The truck will be unplugged when not travelling.

 

[rusty]

please take your truck to a pro!! you have no idea what your doing. js

 

[LBZ]

I installed the furnace this weekend now wondering if it took the hot wire from the trailer plug in and ran it to the positive side of the battery in the trailer will it charge as I am travelling? Also what else do I need to do if that will work, run a ground to the battery from inside the trailer, do I need a isolator switch? The truck will be unplugged when not travelling.

That will work so long as the ground from your trailer plug is also grounded to the trailer. No need for an isolation switch unless you want to leave the trailer plugged in and not kill the truck batt. when the furnace is running.
The primary use for the hotwire is to charge the emergency breakaway battery on trailers with electric brakes. Also it's available for accy. power as needed. You should be fine.


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[firecatab]

please take your truck to a pro!! you have no idea what your doing. js

Thanks Rusty you are a BIG help, takes all kinds to make this world work I guess!

 

[OVERKILL 19]

I installed the furnace this weekend now wondering if it took the hot wire from the trailer plug in and ran it to the positive side of the battery in the trailer will it charge as I am travelling? Also what else do I need to do if that will work, run a ground to the battery from inside the trailer, do I need a isolator switch? The truck will be unplugged when not travelling.

I did something simular at the old shop. Rigged up solar powered battery charger and ran connetiond with trailer plugs on them so when the boys backed the trucks in they just plugged into the trailer plug to keep batteries charged. Note! I ground off the little keeper on the plug so when the bone heads drove away still plugged in they didnt take the fence with them!

 

[summit889]

Anyone know where to get underside of a trailer insulated and approximate cost?

 

[LBZ]

Anyone know where to get underside of a trailer insulated and approximate cost?

Check with your local RV dealers. Some of them do it.