Parts Needed to Charge Trailer Battery with 7-Way from Tow Vehicle with 4-Way

Updated 07/19/2017 | Published 07/18/2017

Products Featured in This Question

7-Pole, Round-Pin Adapter for Hopkins Tow Doctor Vehicle-End Test Unit

(2)

$54.63

10 Gauge Wire - Blue Primary - Per Foot

(108)

$1.65

40 Amp In-Line Circuit Breaker - Perpendicular Mount Bracket

(98)

$9.88

Question:

I have a 2010 Tacoma with a 4 prong male connector I just purchased a 2015 little guy camper with 7 prong female connector. The reason Im asking this Question is the 7 prong will actually charge battery while towing! What parts will I need to make this happen?

asked by: Bill

Expert Reply:

The adapter you need is the part # 37185. This will allow you to plug your vehicle 4-way into the adapter 4-way and give you a 7-way with functional taillight circuits.

Now to allow the vehicle to put a maintenance charge on the trailer battery you will need to run a ten gauge wire like part # 10-1-1 (sold by the foot) from the black wire of the adapter to the positive post of the battery through a circuit breaker like part # 9510.

expert reply by: Jameson C