Using Auxiliary Pin On 7 Way Connector To Charge Boat Battery

Question:

Im wanting to keep a trickle charge on my boat while driving. Going from the 12 volt wire on the 7 pin trailer plug, do I just need the hot wire to the boat battery or do I need a ground wire to the boat battery also.

asked by: Robert M

Expert Reply:

You can in fact use the 12v accessory circuit on your vehicles 7 way connector to maintain your boat's battery while driving. The 12v accessory circuit is located at the 1'oclock position on your vehicles 7 way. Using # 10-1-1 you would run from the 7 way to the positive terminal on the the boats battery, and the negative would ground to the trailer frame.

To note, the 10 gauge wire # 10-1-1 is sold by the foot.

expert reply by: Bryce D