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Old 09-27-2017, 08:23 PM   #1
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Trailer Brakes Locked Up

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.
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Old 09-27-2017, 08:29 PM   #2
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Is there any chance the emergency brake switch engaged? That would lock the brakes.
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Old 09-27-2017, 08:34 PM   #3
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Quote:
Originally Posted by Crabman View Post
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.
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Old 09-27-2017, 08:39 PM   #4
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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.
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Old 09-27-2017, 08:41 PM   #5
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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.
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Old 09-27-2017, 08:41 PM   #6
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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....
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Old 09-27-2017, 08:52 PM   #7
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That's a thought, i'll make sure to trace all my wiring from the coupler back through the frame. Thanks a million crabman!!
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Old 09-28-2017, 05:35 AM   #8
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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
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Old 09-28-2017, 10:08 AM   #9
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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!
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Old 09-29-2017, 07:55 AM   #10
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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
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