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Intermittent Brake Lights Using The Tow Ready T-One Wiring Harness # 118302 On A 2006 Honda Accord  

Question:

I have this wire harness hooked up to my 2006 Honda Accord. The trailer running lights and blinkers work fine, but the brake lights on my car, and trailer work intermittently when i have the plug hooked up. Any idea what would cause this?

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Expert Reply:

I would check the ground connections on the vehicle and the trailer. A weak ground is just strong enough to provide some lighting functions, but not all of the functions.

On the Tow Ready T-One Wiring Harness, part # 118302, there will be a white wire with a ring terminal on it. You will want to make sure that it is connected to a good,clean ground on the vehicle.

On the trailer you will want to make sure the white wire on the 4-way trailer connector is connected to a good, clean ground on the trailer frame. Also, check each tail light assembly on the trailer to make sure they are grounded properly. This is done in one of two ways. The first is by a separate wire coming from the back of each tail lamp assembly being secured to the frame. The second, and most popular, ground is achieved through the bolts of the tail lamp assembly. In this case, the lamp housing must be attached to the frame of the trailer. If the lights are mounted on wood or PVC material, the light will not receive ground.

I am including a link to the installation instructions on the Tow ready wiring harness and a link to a FAQ page on trailer wiring that will describe how to troubleshoot your trailer wiring.

expert reply by:
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Jeff D

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