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What Ohms Should Trailer Brake Magnets Be?  


When I have my brake controller connected and I apply my brakes, the trailer brakes grab regardless of the gain setting. I checked the ground and its good. I checked the resistance at each brake and one reads 2.0 ohms and the other reads 2.8 ohms. Single axle.


Expert Reply:

Assuming that when you tested the resistance of the brakes you were testing the two wires on each magnet and getting 2.0 and 2.8 ohms the magnets on your trailer are not working correctly and will need to be replaced.

For 7" brakes you should get 3.8-4.0 ohms, and for 10-12" brakes you should have 3.0-3.8 ohms.

If the brake shoes themselves are good you can replace just the magnet using 7" # AKBRKR-M7, 10" # AKBRKR-M10, or 12" # AKBRKR-M12.

If the shoes are needing replacement as well you will need to go with 7" braking assembly # AKEBRK-2, 10" # AKEBRK-35-SA, or 12" # AKEBRK-7-SA.

I included videos for the products mentioned for you to take a look at.

expert reply by:
Samuel C

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