Troubleshooting 7-Way Replacing 6-Way Install Where Brake Output Stopped Working

Question:

I have went from a 6 pin to a 7 pin and when wiring everything up in a junction box I cannot get my brakes to work. Everything else works but I cannot seem to get the brakes to work!! Can you help?

asked by: Danny H

Expert Reply:

The is most likely related to the fact that there are two ways a 6-way will typically get wired and the only difference is that the 12 volt accessory circuit and the brake output circuit are switched. I attached a picture that shows a diagram for a 6-way for you to check out. Most likely something got mixed up when making the conversion due to the difference there so you'd need to check the wiring.

expert reply by: Jameson C