Electric Over Hydraulic Brake Actuator Not Working w/ OEM Brake Controller on 2020 Chevy Silverado

Question

Question:

I have a 2020 Silverado 3500HD with integrated brake controller, and a new trailer with Dexter 1600 EOH brake actuator. The truck erroneously reports trailer brake problems and stops sending brake control. Ive read conflicting info about whether the Titan EHB adapter T4846000 would fix this problem. Can you advise me on this?

asked by: Don C

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Expert Reply:

According to Hydrastar, the # HBA-CAM is designed to help electric over hydraulic brake actuators communicate correctly with OEM brake controllers, however they couldn't say if their adapter works with actuators from other manufacturers. As a contradiction, the folks from Dexter says it WILL work. Because we haven't tested it ourselves, I can't guarantee it'll work but it seems likely as Dexter doesn't seem to have a vested interest in the argument.

Deactivating your OEM brake controller and installing an aftermarket controller that's compatible with EOH brake systems is a sure bet. I'd recommend the Tekonsha P3, part # 90195. The P3 is a proven performer that is fully compatible with EOH braking systems. To install the controller, you'll need the # 3064-P wiring harness.

To install the harness, you'd plug one end into the socket under the dash near the emergency brake pedal as shown in the provided photo. Cut the dark blue wire in the harness and connect a length of wire long enough to run through the firewall, under the vehicle to the trailer connector at the rear bumper. Cut the blue wire exiting the connector and splice on the wire you ran from the front. I'll link you to a help article that explains how to do this.

expert reply by: Mike L

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Answer 1

When you hooked up to the GM trucks, did you notice if the truck said trailer connected? The towing computer on the newer GMC trucks is kind of finicky and if it did not recognize the trailer, or the trailer was not setup in the system it will not…

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Answer 2

Hello Mike, thanks for reaching out. It sounds like your trailer has LED tail lights which are causing the power pulse. This is unfortunately fairly common with newer trucks and trailers with LED lights. The 7-Way Trailer Adapter for Towing Trailers…

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Answer 3

If you will be towing a trailer with LED lights then you will likely need to use an adapter with a lamp-out sensor like the Tow Ready #20142 or Curt #C57003 that you referenced. Both of these adapters will accomplish the same task; plugging into an…

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Answer 4

The red wire on a brake controller signals the controller that you are stepping on the brake pedal, so it has to be connected. It does not operate the brake lights on the trailer. It attaches to the cold side of the brake switch. The brake switch is…

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Answer 5

According to Dexter, their electric over hydraulic actuators should be compatible with the OE brake controllers, but in practice we find that is not always the case. We have found that the GM OE brake controller is not compatible with other electric…

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Answer 6

The Dexter BrakeRite Electric Over Hydraulic Actuator #DX82KR will need the adapter installed to be compatible with your 2007 Ford F-250 brake controller. The correct adapter is the Adapter Module for BrakeRite Electric Over Hydraulic Actuator…

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Answer 7

This is definitely something that is frustrating and unfortunately, my answer is not going to be much better. When we have brought this to Dexter in the past, they have told us that their Electric Over Hydraulic actuators like the Dexter DX Series…

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Answer 8

First I suggest you double check your wiring from the controller. Typical brake controller wiring is: Red wire goes to the brake switch cold terminal, which gets power only when the pedal is pressed; Blue wire connects to the trailer brake circuit;…

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Answer 9

According to Dexter Axle, beginning with the 2015 model year, the GM OEM brake controller will be compatible with the Dexter Electric Over Hydraulic Trailer Brake Actuators like part #K71-651. Previous model years weren't compatible, and would…

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Answer 10

I have to go off the GM dealership recommendation. If they are saying you need the Hydrastar #HBA-CAM or Dexter #DX35FR adapter module for your factory brake controller to work with your electric over hydraulic brake actuator, then I can't really…

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Answer 11

The integrated brake controller of your 2022 GMC Sierra 3500 has a hydraulic mode which would allow it to work with electric over hydraulic actuators without needing an adapter. With that said if for some reason the controller wasn't recognizing…

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Answer 12

As you mentioned, the integrated brake controllers on your Silverado 3500 trucks will typically not work with electric over hydraulic trailer brakes. The Chevy/GMC factory controllers are simply not compatible with electric over hydraulic brakes and…

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Electric Over Hydraulic Brake Actuator Not Working w/ OEM Brake Controller on 2020 Chevy Silverado

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