The Stovebolt Site Forums The Shop Area The Electrical Bay Taillight, brake, turn signal wiring

When you test it, you need to provide loads on the car side of the adapter. That is, connect blinker and brake light bulbs on the car side. If you didn't do that, you should try it. The blinker bulbs would represent the load given by your front blinker lights.

I used one of those trailer adapters for years and I had no problems with it.