Posted by Doug - Iowa on July 25, 2012 at 06:31:02 from (97.64.139.194):
I usually keep my brakes working without too much trouble but I've got one trailer that is getting the best of me. Maybe one of you all can see what I'm missing. Here's what I've done so far:
Hitched truck to a buddy's trailer, I can lock them up both on the pedal and on the manual over-ride, so I'm assuming its not the truck.
Hitched to the problem trailer, I have all lights working so I'm assuming I have a good ground.
I can hear clicking from the brakes but have no braking effort.
I have 11 volts at the connector on the truck, and at the first junction box on the trailer on the brake circuit. It varies down to 5 volts as you turn down the controller as expected. This is with the engine off so probably another volt or two when running.
I removed both wheels on one side and inspected the innards. Magnets show some wear but not worn down to the cores (the trailer is older but only has I'd guess 10,000 miles on it). Pads are good, no uneven wear. I did set them up a little with the adjuster, but still no work.
I followed the wiring along the frame and between the axles, no indication of corrosion or bad connections.
So, I plan to open up the other side tonight and see if one of the magnets is shorting and taking all the current. I also thought about running a hot wire directly to the junction box from the truck and see if I can bypass the controller and trailer wiring to that point. I've had magnets fail before but not all four at the same time, so I can't help but think it is a wiring issue. Any ideas?
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