Brake Control Connection Light Not Working When Trailer is Connected to a 2006 Toyota Tundra

Question:

I own a 2006 Toyota tundra, Ihave installed a Tekonsha Voyager brake control to the factory tow package connection, it is connected to the trailer, but the green light does not come on, however when the test light is used on the blue wire and the brake pedal is depressed the green light comes on. What is wrong? John

asked by: John

Expert Reply:

It sounds as if the ground wire for the brake controller is not making a good connection. I would try finding a good ground location to connect the extra ground wire that is installed on the brake controller wiring harness, # 3040-P.

This harness requires the additional ground wire because the Toyota vehicles it works with have weak ground systems and need the extra help. When you are testing with the test light, the brake controller is sensing a completed circuit and the amperage draw from the light on the test light is causing the ground connection to be completed.

You should also make sure the brake controller power wire has power and that the there is no corrosion inside the trailer connectors that could be causing a loss of connection between the vehicle and trailer.

expert reply by: Robert G