What Adapter do I Need for My OEM Brake Controller to Work with Electric Over Hydraulic Brakes?

Question

Question:

Can this be used on a hydrastar hydraulic actuator?

asked by: Keith

0

Expert Reply:

Hello Keith,

Yes, the Adapter Module for BrakeRite Electric Over Hydraulic Actuator for OE Ford and GM Brake Controllers # DX35FR will work with your OEM brake controller and a Hydrastar electric over hydraulic actuator like # HBA16. I’m really hopeful that manufacturers will eventually update OEM brake controllers to work directly with electric over hydraulic trailer brakes, but until that day comes, this adapter is the correct solution.

What kind of trailer are you towing, work, fun, or a little of both?

expert reply by: Kate F

0

Adapter Module for BrakeRite Electric Over Hydraulic Actuator Installed with Dexter Actuator
(click to enlarge)

Keith

2/4/2026

This is actually for one of my customers, I work for a trailer and tractor shop, so I am always seeking information on odd ball issues like this or trying to find uncommon or unknown parts, and you guys have been a great help in locating the information, and have awesome customer service

Kate F.

2/4/2026

@Keith Hope you guys have a dealer account with us as well, if not make sure you fill out the attached Dealer Application so we can see if you qualify for a discount as well.

Helpful Links

accounts/dealerinquire.aspx

Mark S.

2/11/2026

@Keith I’m sure the module is doing what its supposed to do but my truck isn’t, I had a 5500 ram dump and everything worked fine, traded it in for a 2024 Chevy 6500 and it doesn’t work my electric over hydraulic brakes, had it to the dealer 3 times they say it’s fine but that’s BS, my option now is to run a new line to the back of the truck and run a after market controller, from what I’ve seen it’s a Chevy thing and they don’t have any answers, good luck

Kate F.

2/11/2026

@MarkS I heard there was a class action against Chevy and the OEM brake controllers because they do not work with EOH. Hopefully they get it right one day, until then we will just have to use the adapters. Thanks for the response Mark.

Answer 1

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 2

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Answer 3

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Answer 4

Hey Kevin, so this is a very valid question but the integrated brake controller of your 2024 GMC Sierra 3500 has a hydraulic mode which allows it to be compatible with EOH actuators like the Hydrastar kit part #HSE7K-T1 that you are interested in so…

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Answer 5

The brake actuator that you have or purchase will state specifically what fluid you will need to use either on the cap or in the owners manual if not both. For the Hydrastar Electric Over Hydraulic Brake Actuator, #HS381-8067, you would be using DOT…

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Answer 6

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Answer 7

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 8

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Answer 9

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Answer 10

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 11

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Since the pin weight of your camper is 2.1k, I recommend going with the LoadLifter 5000 opposed to the 7500. While technically there is not reason you couldn't use the 7500 kit, it really is not necessary for a camper like yours. Generally the…

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What Adapter do I Need for My OEM Brake Controller to Work with Electric Over Hydraulic Brakes?

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