Trailer - Electric Brakes Not Working

[LouZ]

Brian Minkin wrote:

Lou,

It would appear

A: the controller is not hooked up to the wiring harness correctly

Rechecked the wiring harness: OK - Prodigy harness to Ford connector plug under dash

or

B: That the harness of the trailer has a break in it beyond the connector. It should go to a junction terminal under the trailer.

You can check the trailer harness with an ohm metter for continuity

Continuity checks out from trailer plug to J-box

but I am not sure how the controller works and if will will send out voltage when the brakes are actuated if it does not sense the trailer.

Also check the trailer connector for corrosion, I had that problem with the one on my old trailex only it was the brake lights that would not work.

Both Explorer and trailer plugs are free of any corrosion

The next thing I'm going to try - put +12V to the "Blue" wire (Electric brake OUTPUT) and then check for Voltage at truck connector! I just have to keep thinking the troubleshooting procedure through!