blazzinbird

I want to test my 7 pin to make sure I have trailer brakes before I'd travel three hours to go pick up my travel trailer tomorrow. is there an easy way to do this from my garage?

smokeywren

Yeah, not free, but I'm lousy with automotive wiring, so I invested in a 7-pin trailer plug wiring tester. That's what you need. Here's mine:
https://www.etrailer.com/Accessories...nsha/6562.html


Any RV shop should have a similar tester, but their service is usually not free either.




Here's the same thing for less money, but without the Tekonsha name on it.
https://www.etrailer.com/Accessories...y/TR20117.html

ifallsron

You can use a circuit tester to ensure there's power coming out of each pin. If it's wired correctly, you should be OK. 7-pin testers like above are available, too, at stores that sell auto electronics.

Norotso

Take a 12v test light and have someone use your brake controller to see if you have power at the blue

blazzinbird

Power on blue wire, now a new problem time to adjust the brakes on the TT.