Back tires keep locking up

[Sakman33]

Hello- I have a 2004 triton Tr20 and the back tires on my trailer keep locking up. It only happens when backing into my driveway. There is little dip then my driveway starts. As soon as I hit that little dip they lock up. Its starting to drive me crazy... Anyone else have this issue? Thanks

[wmitch2]

Check your connection for the back-up/brake lock out at the truck and at the plug on the trailer side. Sounds like you're not getting power or a bad connection.

[Sakman33]

Yea, I figured its an electrical issue. Thanks!

[billnorman1]

Since the trailer and truck change relationship at that dip, I'd think the white wire, ground, is not connected and the ball is making the connection.

[Sakman33]

Great. Thank you!

[Sakman33]

Also, I have to collapse my swing tongue every time to fit the boat in my garage. I'm thinking that's causing the wiring issue ?

[billnorman1]

Also, I have to collapse my swing tongue every time to fit the boat in my garage. I'm thinking that's causing the wiring issue ?

You might have hit the nail on the head. Some swing trailers are grounded to the front and lose the ground when the trailer moves on the hinge. You might need an additional grounding wire from the tongue to the back part.

[Sakman33]

Thanks!

[Chasman]

Check your back up lights on your trailer. Check for blown fuse in your truck. I think it’s labeled trailer back up. I had the same problem. It was my back up light on the trailer. Bad contact. I would take it off the trailer, clean it and put it back on. It would work for awhile, then blow a fuse again. Hope this helps

[Sakman33]

Thanks! appreciate it.

[Fins]

Are these surge brakes? If so, you probably have a lockout device you can put in sliding portion of the actuator to prevent the lockup. It stops the actuator from compressing.

On my rig the blue wire connects to the actuator solenoid and when it's working you don't have to use the above mentioned lockout device. The other end of the blue wire ties into the white reverse lights on my truck. If yours is similar, make sure your backup lights on your rig are coming on when you put it in reverse. If they aren't, you're blue wire isn't hot and it's not triggering the solenoid which is why it's locking up.