Parts Needed to Replace Wiring On Car Tow Dolly

Updated 03/24/2021 | Published 03/22/2021

Products Featured in This Question

Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector

(709)

$78.16

10 Gauge Wire - Blue Primary - Per Foot

(108)

$1.61

Parallel Multi Conductor Wire - 14 Gauge - Green-Yellow-Brown - per Foot

(6)

$2.47

Question:

I have a car dolly that the wiring is bad. I would like to know if you had any products that will work with my car dolly. Thank you

asked by: Joe B

Expert Reply:

The replacement needed will depend on which trailer connector your car dolly uses, a 4 pole or a 7-way.

For a 4-pole, a standard trailer wiring harness like # HM48240 would work well for you.

If the tow dolly has a 7-way connector on it with electric brakes, I'd go with something like # 277-000141 to provide the trailer connector and junction box. The junction box allows you a safe spot to make your connections that will keep moisture away from the wiring connections. You'd use a length of wire like # 10-1-1 to run your brake circuit from the junction box to the brake magnets and # SWC4332-1 (sold by the foot) 3-conductor wire for the lighting circuits.

I'll link you to a help article about trailer wiring that you'll likely find helpful.

expert reply by: Mike L