Posted by Steve@Advance on August 09, 2021 at 15:28:32 from (47.37.93.118):
In Reply to: Trailer update posted by super99 on August 09, 2021 at 14:09:55:
If you disconnect the black wire from the blue, and push the brake pedal, do the brakes lock?
If so, the stoplight voltage is somehow getting to the brake magnets.
Look for a crushed cord, somehow the signals are getting crossed.
That the light on the controller comes on with the black wire connected is good, but the controller is only looking for a source to ground. It doesn't know a brake magnet from a light bulb.
With a test light on the blue wire from the controller, the only time you will get a signal is with your foot on the brake AND pushing the test slide. The light should start out dim and get brighter the further you push the test slider.
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