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NanciL's avatar
NanciL
Explorer II
Nov 22, 2014

Electrical truck to trailer connection question

Can I use an extension cord to connect between my truck connector and my trailer cable connector ? If yes do I have to worry about a voltage drop if the distance is too long. I park my trailer in ...
Old-Biscuit's avatar
Old-Biscuit
Explorer III
Nov 22, 2014
:H

Plugging in truck/trailer umbilical cord only provides power for trailer exterior lights (turn/stop/running)---brakes----and a 'charge line' for trailer battery.

Charge line is really only helping to maintain trailer battery voltage IF truck is running.

Trailer battery is providing the DC for interior lights and furnace to run.

Then just hook up a portable battery charger via extension cords OR remove battery and take it to a portable batter charger if unable to do so in trailer

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