Forum Discussion

Explorer

Aug 29, 2018

Trailer brake malfunction

Our trailer brakes are essentially useless. When the brake is applied lightly the trailer brake increases until it locks. If the brake controller is adjusted to the proper level this causes the trailer brakes to lock up and jerk free when released. It does not apply proportionally to the amount of pressure applied to the truck brake. Adjusting the controller down does not fix the problem as it only resolves when the level to low enough where essentially no braking is applied to the trailer.

This occurs in every trailer we haul (horse trailer, dump trailer and flatbed trailer). All trailer function appropriately when hooked up to other trucks. We have had the brake controller changed and an additional new controller tested within the same results. All trailer brakes have been inspected and are wiring appropriately. Trailer plug outlets have been replaced.

This has been looked at by several mechanics and trailer shops without any luck identifying the problem.

Truck is a 2003 Chevy 3500 dually. Current brake controller is a Curt brand.

Any suggestions would be appreciated.

Campfire_Time
Explorer
Aug 30, 2018
My P2 has been used on 2 trailers and 3 tow vehicles. Its 13 years old and has performed flawlessly.
Big_Katuna
Explorer II
Aug 30, 2018
Do they show amps being used?
RCMAN46
Explorer
Aug 30, 2018
Big Katuna wrote:
Do they show amps being used?

The P3 does show amps plus some more diagonistics. Major difference between the P3 and the P2.

Operation wise they are th e same.
Big_Katuna
Explorer II
Aug 30, 2018
I would think knowing amps would enable you to more precisely adjust settings.

One could also wire in voltage monitoring wires from inside the hub so I could measure the voltage under load to ensure good voltage delivery while sitting still.
Cummins12V98
Explorer III
Aug 31, 2018
jerem0621 wrote:
Cummins12V98 wrote:
Slocoemt wrote:
Thank you everyone. I will give the prodigy a try.

Forget the P2 and get a MUCH better controller in the P3.

The display is better but it’s performance is the same. Nothing wrong with a P2. They are fine brake controllers.

I owned a P2 and I set it up per directions. I had to change the "BOOST"? every time I changed from Campground speed to highway speed etc. From what I understand the P3 is set and forget as it should be.
larry_barnhart
Explorer
Aug 31, 2018
Have not had a p-3 but what I have either read or been told no difference in the operation. My P-2 is no an issue. As said before only in a gravel road is when I use the first boost. Not often. My thinking is have what you like.

chevman