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Surge Brakes to EOH Conversion

Old 06-04-2024, 12:28 PM
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Not trying to hijack the thread, but a lot of good information is in here.

I want to do this for my trailer. I have surge brakes today, its a brand new trailer. I feel like the brakes get really hot and you can smell them anytime I stop when trailering the boat. Not sure if this is normal for trailers in general, or if my surge brakes are possibly slightly engaged when towing. I feel like this could be something that resolves this issue for me if its even an issue.
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Old 06-04-2024, 01:06 PM
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Originally Posted by Wildman_grafix
When I bought the Hydrastar kit they had started to put the adapter module in all of them. They said it was just easier.

Do they not do that anymore?
Wildman,

Hydrastar® MARINE Surge Brake Conversion System to Electric Over Hydraulic (EOH) Brake Actuator

Doesn't look like it. Maybe they got the "Just makes it easier" resolved. Don't know. Tech on the phone said I'd be OK.

Thanks. Brad.
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Old 06-04-2024, 01:28 PM
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Originally Posted by DallasBAJA
Not trying to hijack the thread, but a lot of good information is in here.

I want to do this for my trailer. I have surge brakes today, its a brand new trailer. I feel like the brakes get really hot and you can smell them anytime I stop when trailering the boat. Not sure if this is normal for trailers in general, or if my surge brakes are possibly slightly engaged when towing. I feel like this could be something that resolves this issue for me if its even an issue.
DallasBAJA,

Could be a slight maladjustment from the initial build. It could also be that your sliding couple isn't fully retracting for whatever reason. Just stabbing in the dark, here. Hard to say EOH would fix the former. Obviously, the latter is eliminated with EOH. I'm definitely not a brake guy, but that doesn't sound normal to me. I've never had this issue on any surge brake trailer I've had experience with.

Thanks. Brad.
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Old 06-04-2024, 03:26 PM
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Brad,

This is the one I bought, plug and play.

https://hydrastarusa.com/product/hyd...-n-play-w-cam/


Originally Posted by Brad Christy
Wildman,

Hydrastar® MARINE Surge Brake Conversion System to Electric Over Hydraulic (EOH) Brake Actuator

Doesn't look like it. Maybe they got the "Just makes it easier" resolved. Don't know. Tech on the phone said I'd be OK.

Thanks. Brad.
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Old 06-04-2024, 03:39 PM
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Originally Posted by shunter2005
Well, it could be several things. I'm assuming that you have not installed EOH yet, correct?
1. Once you install you could find it works perfectly. "Supposedly" all OEM brake controllers manufactured after 2016 were/are EOH capable. I say "supposedly" because not all controllers after 2016 would work with EOH without a controller assist module (CAM) or electric brake magnets wired inline to get the controller to recognize the EOH actuator. No real explanation as to why, but it is known they didn't. No GM vehicles with the OEM controller prior to 2016 would work without the CAM/magnets. They were built for electric brakes only back then.
2. You should have a 30A fuse in the fuse box under the hood that provides steady 12v power to the trucks 7-pin connector at the rear of the truck. Test the 12v at the 7-pin before you start to make sure it's hot. If not, check the fuse. Not sure, but it could be #63 under your hood. Your fuse number might be different than my '19. Several years GM did not provide a fuse and used a dummy.
3. Very uncommon, but once in a while you could get a bad actuator. Hydrastar, as stated, has great customer service and they will make it right. Again, rare occurrence. If you are sure you have power to the 7-pin on the truck and your actuator does not work, it could be bad.
4. TRIPLE CHECK ALL YOUR GROUND WIRES. Make sure they are making good contact and are tight.

There is nothing wrong with any of the EOH actuators out there. There are many Hydrastar, Dexter and Titan (which is now owned by Dexter) controllers and everyone has different opinions of them. Like many on this thread, I'm a Hydrastar guy, but I would have no aversions to using Dexter or Titan. I just liked the look of the Hydrastar. I would also suggest the plug and play version for easier installation regardless of the brand.
Final thing. Check what the DIC tells you. Plug into the 7-pin with the motor off and then start it. If the DIC says "Trailer Connected" or similar, you should be good to go. If all is good wiring wise and it still doesn't work, I would go buy a couple of electric brake magnets and wire them into the blue and white wires of the harness after the actuator. If that works, you can leave them as is or then buy a proper CAM to install. It would be strictly for aesthetics.

Couple of pics of my set up. Trailer and wiring box has been powder coated silver now.


Shunter,

So, is yours the "plug-n-play" kit? Is that the reason for the box?

Thanks. Brad.
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Old 06-04-2024, 03:40 PM
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Originally Posted by Wildman_grafix
Brad,

This is the one I bought, plug and play.

https://hydrastarusa.com/product/hyd...-n-play-w-cam/
Wildman,

So, I guess your original trailer connecter connects to the socket with the kit, then the connecter from the kit plugs into the truck?

The PNP has some appeal in its simplicity, but the other one seems to result in cleaner installs. Just my observation.

Thanks. Brad.

Last edited by Brad Christy; 06-04-2024 at 04:10 PM.
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Old 06-04-2024, 04:38 PM
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Originally Posted by Brad Christy
Wildman,

So, I guess your original trailer connecter connects to the socket with the kit, then the connecter from the kit plugs into the truck?

The PNP has some appeal in its simplicity, but the other one seems to result in cleaner installs. Just my observation.

Thanks. Brad.
Correct, but on the old steel trailer I put everything in a SS box. Strange they only include the adapter unit with the plug and play.
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Old 06-04-2024, 04:43 PM
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Originally Posted by Wildman_grafix
Correct, but on the old steel trailer I put everything in a SS box. Strange they only include the adapter unit with the plug and play.
Wildman,

Oh, they offer it. But it's $125 on its own, while it's only a $75 upcharge for the PNP kit over the DIY.

Like I said, I'm tempted to order the DIY kit and the CAM, and just send the CAM back if I don't need it. That way, I'm not dead in the water if I do end up needing it.

Thanks. Brad.
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