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Brake Controller Recommendation to Bypass 2018 GMC Sierra 3500 for EOH Style Trailer Brakes


I recently upgraded to an electric over hydraulic brake system on my Kaufman ez-4. My brakes wont engage on my trailer from my factory trailer brake.2018 GMC Sierra 3500 Is there an adapter for the Dexter set-up, or is an aftermarket trailer brake the best solution?


Expert Reply:

The Dexter electric over hydraulic actuators don't have an adapter made for them that allows them to be used with integrated brake controllers like what your 2018 GMC Sierra 3500 has but even if they did I would not recommend that route as they don't work consistently. Instead you'd be best off with a new brake controller that has an EOH mode such as the P3 part # 90195 which we know will work flawlessly. You'll need the install harness # 3016 as well.

First you will cut the blue wire on the plug-in wiring adapter and connect it to enough 12-gauge blue wire to reach the rear of the truck. Now at the 7-way trailer connector at the back of the truck, you will cut it's blue wire approximately 4 to 6 inches from the connector and connect it to the blue wire that was run from the brake control wiring harness. I recommend using Deka Heat Shrink Butt Connectors, # DW05745-10, and electrical tape when making all electrical connections. Now you are ready to plug the wiring adapter into the brake control port up under the dash and into the back of your new controller.

expert reply by:
Jameson C

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