Troubleshooting Electric Lockout on Trailer w/ Surge Coupler and Solenoid

Question:

I have the same issue, but I just replaced the actuator with solenoid I can hear it engage when in reverse but trailer won’t back up. The only difference in the original actuator vs new the solenoid has 2 wires my old had single. I did ground the white wire. Solenoid gets power but doesn’t engage. Help please?

asked by: John G

Expert Reply:

It sounds like you have replaced both your actuator and possibly your solenoid and are still having an issue with the brakes engaging when you reverse. If I am reading your question correctly it definitely sounds like a wiring issue leading up to your actuator and solenoid if everything's new.

You will want to use a circuit tester like item # PTW2993 to check the accessory pin on your truck's 7-way. If you're getting power through this then you'll want to inspect your ground wire. Make sure it is securely attached to a bare piece of metal that isn't corroded or rusted over.

If you just replaced the actuator and you're using your original solenoid, I recommend replacing it with the Replacement Solenoid Valve item # T4748800 you were looking at.

expert reply by: Jerred H