Trailer Brakes Locked Up

[islandman63]

Guys,

Just had something weird happen for the first time on our Jayco FB22. Hooked up trailer and pulled from storage lot, went about 10 miles down the road till i came to light. When i almost came to a stop, the trailer brakes suddenly locked up. I put truck (2015 F150 3.5 Ecoboost) in park, then drive to see if i could move, nothing, brakes locked up. In order to get home, i had to unhook trailer cable in order to get trailer to move.

In ideas what that may have been?

BTW, once home i forgot to plug cable back in to see if brakes would lock up. Will try tomorrow after work though.

[Crabman]

Is there any chance the emergency brake switch engaged? That would lock the brakes.

[Grumpy]

Originally Posted by Crabman

Is there any chance the emergency brake switch engaged? That would lock the brakes.

It's either that or a bad controller, they're the only 2 power sources.

[islandman63]

Yeah, that's the first thing i checked while at the light to make sure the breakaway pin didn't come out. That all looked good.

[islandman63]

Grumpy, i'm leaning toward the controller, it's thrown a fault another time several months back. Can't remember the exact msg, but it was something along the lines like trailer wasn't connected as i was pushing down the hwy.

[Crabman]

I suppose one other possibility could be a pinched or somehow otherwise compromised power cable engaging the brakes? Not likely but I did pinch and tear into my cable one time....

[islandman63]

That's a thought, i'll make sure to trace all my wiring from the coupler back through the frame. Thanks a million crabman!!

[chrismoore701]

Check your cruise control on your TV, if it does not hold your speed it is your brake controller sending out a false reading that your brakes are pushed which hold the brakes on your trailer. I had this happen to my trailer and it was the brake control switch on my 09 Silverado. Like $20 and 10 min to change

[islandman63]

Chris, i haven't tried that yet, i usually don't use cruise control when at hwy speed. I see your point though, this coming weekend will be our next trip, i will set my cruise and see if the truck is lagging after that.

Thanks a million for the tip!

[chrismoore701]

The cruise on my truck was acting up on regular travel. It was the brake switch giving a false reading so the cruise would kick out. That same false reading went to my brake controller and held my brakes. Easy fix. With YouTube