Posted by Steve@Advance on May 18, 2015 at 19:55:52 from (107.203.134.67):
In Reply to: trailer brakes redux posted by Steve in VA on May 18, 2015 at 18:51:41:
You'll have better success checking it with a test light.
The volt meter is picking up the "sensing circuit", the small voltage, low amp signal that feeds back to the controller letting it know the circuit is complete (the LED that comes on when connected) and not shorted to ground.
Connect the test light to the terminal that makes the LED on the controller light. The test light should be off. Then have an assistant push the manual slide. The test light should slowly come up to power. If it does, the controller is working.
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