How to Hardwire a Trailer Brake Controller on a 2002 Toyota Tacoma

Expert Reply:

The 2002 Toyota Tacoma requires a hardwire installation for a brake controller. The problem you are most likely running into on the 7-Way you are trying to install is that you either have not connected a 4-Way to the 7-Way you have or you have not connected all the loose wires.

If you need a 4-Way, you can use # 118379. I have included a link to the installation details and a link to a video showing a typical installation.

Once you have the 4-Way connected to the 7-Way adapter, you will still have 4 wires to connect. White is ground, connect it to the vehicle frame. The black wire connects to the positive battery terminal via a 40 amp circuit breaker, # PK54540.

The blue wire will connect to the blue wire on the back of the brake controller. That should leave you with one remaining wire that will go to the reverse light wire behind one of the vehicle tail lights. If the trailer does not have reverse lights you do not need to connect this wire.

The # 5506 installation kit you have is good for wiring the brake controller black, white and red wires, but you will need more wire and other parts to make the connections from the back of the truck to the battery and brake controller. We recommend # ETBC7 that comes with everything you will need. But, since you already have the 7-Way and most of an installation kit, you will need that 40 amp circuit breaker, and probably about 25 feet of # 10-2-1 wire.

You can still follow the installation FAQ and video for the ETBC7 that I have lined for you. The only other part you may need is a circuit tester, # 3808.

expert reply by: Michael H