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Reverse Lock Out Recommendation for a Trailer Converted to Disc Brakes


I have an original dual axle trailer for a 2003 centurion air warrior boat. The front axle brakes were recently converted to disc from drum. Now, When backing up, the peg on the side of the hitch will not remain in the foot backup position and the trailer freezes brakes obviously engaging. The truck 5 way harness wiring is all intact circuits tested- hotfoot blue line brakes, L and R turn signals, backup lights. All trailer lights work correctly. Is it as simple as replacing the solenoid which disengages the brakes? I read on etrailer that disc brakes require higher psi 1500 than drum I presume this only refers to the master cylinder and not the solenoid? Is disc brakes on one axle and drums on another compatible? Will the solenoid for backing up always be confused? Of note, now when going down a steep incline to the reservoir lake, the new front axle is smoking literally hot which we did not notice previous to the brake change is this related to the above issue s? Many, many mahalos if you can rectify this mess. I have wedged material in the slot for the peg moving between forward and backup positions to temporize but that is a dangerous maneuver should one forget about it. Most appreciatively,


Helpful Expert Reply:

Since you have a functioning 5-way on your trailer wiring installing the Reverse Lock Out Solenoid part # T4748800 would be pretty easy and it would fix your reversing problem easily. One wire runs to the reverse light circuit and the other wire runs to the ground.

Now to address your larger problem you really need to match all of your brake assemblies. Running a drum axle and then a disc axle is going to make one of the axles do way more work than the other due to the differing pressure requirements. I would recommend you replace your drum brakes with discs and be sure that you have an actuator rated for use with disc brakes.

helpful expert reply by:
Jameson C

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