Recommend Wiring For Adding 7-Way To Existing 4-Way Trailer Connection

Updated 07/27/2017 | Published 07/26/2017

Products Featured in This Question

Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires

(3401)

$101.73

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

(13)

$52.06

Wiring Kit for 2, 4, 6, and 8 Brake Electric Trailer Brake Controllers

(159)

$46.40

Hook Probe Circuit Tester

(62)

$13.33

Question:

I need a harness 7 pin for a 2000 tundra. Tundra didnt come with a tow package, I installed a 4 pin and 4 to 7 pin converter, but need a harness that will send both brake lights and night lights, and so I can use my brake controller. Thanks!

asked by: MAKS L

Expert Reply:

For your 2000 Toyota Tundra, I recommend the Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires # ETBC7 or the # 5506 if you already have the 4-way to 7-way connection. This will give you the circuit breakers, wires, and connectors to install a brake controller and add the 3 functions not included in your 4-way.

The running lights and brake lights should work with your current 4-way, so you may want to check that trailer connection with a circuit tester like # PTW2993 for function. You may need to check your fuses to ensure function, but if fuses are good you just may need to replace it as the modulate may have failed. If you need a new 4 way connector, I recommend the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118367. This custom-fit T-One connector plugs into your vehicle's wiring harness, which is located at the rear, along the driver's-side frame rail. Once you've plugged in the tow harness connector, locate the gray connector between the truck's battery and the fender at the front of your vehicle. Plug in the fuse holder wiring harness. Then attach the ring terminal at the opposite end of the harness to the positive terminal on your truck's battery. Insert the included 10-amp fuse into the in-line fuse holder.

expert reply by: Jason S