How to Add 12 Volt Power Circuit to 7-Way of Vehicle that Does Not Have It

Question:

Ok. Just making sure. I didn't know if having the trailer plugged in with the vehicle off would run all the juice from the vehicle battery to the trailer battery while being off or if it would need something to tell it to only give the trailer battery power while the vehicle is on. So that it wouldn't run my car battery down.

asked by: James G

Expert Reply:

We can set you up with everything you need, but we do not have a kit for adding a charge line to your 7-way.

All you need is wire and a circuit breaker. You'd need a length of 10 gauge wire like part # 10-1-1 (sold by the foot) to run from the 1:00 pin of your 7-way to the positive post of the battery through a breaker like part # 9510 and you'd be set.

expert reply by: Jameson C

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James

9/12/2017

Jameson C.

9/12/2017

Sounds like what you are looking for is an isolation solenoid like part # TR118665. This will allow to wire up the 12 volt power circuit so that it only is active when the vehicle is turned on. I attached a picture that shows how it wires up.