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How to Release the Brakes on a Trailer Once the Break Away Switch Is Activated  

Question:

My breakaway switch cable did snag on some debris last night. It activated the brakes and now the trailer is sitting along Interstate 90. How can I get the trailer rolling again?

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Expert Reply:

If you still have the plunger end that goes in the break away switch, then you can simply insert the plunger back into the switch and that should cut off the power to the brakes on your trailer.

If you no longer have the plunger, then you can either remove the break away battery or cut one of the wires going to or from the break away switch. One wire is coming from the break away battery and the other is going to the brake circuit on the trailer. Cutting one of those wires will terminate the signal going to the trailers brake circuit. I have attached a photo showing where you can cut.

Do not cut the brake wire on the trailer, just the wire from the break away switch to the brake circuit on the trailer.

I have attached an FAQ article on break away switches for you to check out. You may also be interested in a replacement break away switch, # 3802348, to replace your current switch.

expert reply by:
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John H
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Jeff T.

3/2/2020

Thank you for the response. Apparently on my trailer, backing up about two feet is required to disengage the brakes, I did this this morning and they released. Pulled the cable, backed up to release and Im good to go and insured that the new system is working correctly.

Etrailer Expert

Chris R.

3/3/2020

Great news! Just let us know if anything else comes up.

Robert Y.

10/2/2020

@JeffT We've owned a number of trailers over more than 50 years and most with electric brakes have required that you back up a foot or so to release them after they have locked. I would expect that. Just days ago when we evacuated for a fire here our brakes locked. I had to disconnect the plug at the truck and back up to release. Our brake control system apparently needs replacing as every time I plug it in the brakes lock. Going to take it apart today to check it.

Jeffrey T.

3/1/2020

My cable got pulled out while in storage, I purchased a new break away system and cut the wires to install the new one. But, my brakes are still locked up and I cannot move my trailer.

Etrailer Expert

Chris R.

3/2/2020

It's pretty odd that the brakes are still locked up after replacing the breakaway system on your trailer. I assume that they at least released after initially removing the old one (before wiring in the new switch)? If not, then something other than the breakaway switch is causing this. Check for a short on the tow vehicle's brake output circuit. Otherwise make sure all the wiring on the new breakaway switch is correct and that the pin is completely plugged in. Let me know what you find.

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