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Old 06-10-2015, 06:04 PM   #1
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Trailer brakes lock

The electric brakes on my trailer work as they should most of the time, but sometimes one or more of the wheels will lock up. What would be causing this ? Any ideas, Thanks
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Old 06-10-2015, 06:07 PM   #2
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What brake controller are you using ?? What year and model of trailer ??
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Old 06-10-2015, 06:32 PM   #3
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Had the Same Problem

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Originally Posted by captdave View Post
The electric brakes on my trailer work as they should most of the time, but sometimes one or more of the wheels will lock up. What would be causing this ? Any ideas, Thanks
I had the same problem. I'd get the brake controller adjusted to where I wanted it, and it'd lock up after a few stops. Finally took it back to the dealer and they found wiring connections hadn't been made to the brakes on the back axle. Everything is fine now. One more item the factory and dealer failed to finish/find. It was still under warranty.
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Old 06-10-2015, 06:45 PM   #4
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It doesn't sound like a controller issue since it is not occurring on all wheels at the same time. It sound like you are either getting an intermittent short, the magnets are damaged, or it's not a brake issue at all. Your bearings may be going and getting an occasional lock up.

Either way it is not safe to tow. It needs to be fully inspected. I would imagine you'll have some wheel damage as well.

I feel for ya.. just be glad you were paying enough attention to your rig that nothing catastrophic has happened. Good on ya!
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Old 06-10-2015, 06:49 PM   #5
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... I would imagine you'll have some wheel damage as well...
Don't see how he would have wheel damage, but could see some hub damage.
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Old 06-10-2015, 07:01 PM   #6
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Don't see how he would have wheel damage, but could see some hub damage.
I should have said tire instead of wheel. Just thinking that having 1 or 2 wheels locking up and dragging down the road mid tow might not be too good for them.
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Old 06-10-2015, 08:33 PM   #7
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Trailer brakes lock

Might check & see if you are getting some grease on that one brake pad. Also I had a short in a wire going to one wheel that would allow it to drag now an then.

Russell
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Old 06-10-2015, 10:44 PM   #8
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I have a drawtite activator II, trailer is a 2007 cherokee. I plan to take it to the shop, just wondering what might be causing it. Thanks for the information.
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Old 06-11-2015, 09:33 AM   #9
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I have a drawtite activator II, trailer is a 2007 cherokee. I plan to take it to the shop, just wondering what might be causing it. Thanks for the information.
That brake controller may be part of the problem. That is a time actuated brake controller. You set the delay and intensity. If the intensity is set too high, after the set delay is reached you may be applying too much electricity to the brakes.

A proportional brake controller would be a better choice.

The other part of the equation is the year of the trailer. With an 8 year old trailer, a thorough inspection of the brakes are due, including wiring, shoe pad remaining, magnets, along with grease seal inspection/replacement.
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Old 06-15-2015, 03:13 PM   #10
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The trailer seams ok, so I ordered a new proportional brake controller.
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