Testing Trailer Magnets On A Trailer With 12" Electric Drum Brakes
Updated 06/03/2021 | Published 06/02/2021
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Question:
how do you know if the magnet is working, i had 3.5 volts on my gauge an the magnet hardly had any stick to a screwdriver head, it has a faint hum, but the pads look to have not touched the drum on the last 450 mile trip, everything is moving ok, even the star, thanks
asked by: Steve T
Expert Reply:
I have linked an article below on testing brake magnets for you to reference.
You will need a Multimeter # PT89ZR to test the magnets in the Dexter Electric Trailer Brake Kit # 23-434-435.
First you will begin by testing the output coming from the vehicle. Each magnet should see 3.2-4.0 amps of power between 12-13 volts with the brake controller set to max. This test can also be performed with a 12v battery to determine if the problem is with the brake controller or wiring and not the magnets.
You can do an ohm test on the individual magnet to ensure it has the proper resistance. This should be between 3.0-3.8 Ohms when connected to both wires on the magnet.
Product Page this Question was Asked From
Dexter Nev-R-Adjust Electric Trailer Brakes - 12-1/4" - Left/Right Hand Assemblies - 8K
- Trailer Brakes
- Electric Drum Brakes
- Standard Grade
- Self Adjust
- 12-1/4 x 3-3/8 Inch Drum
- 8000 lbs Axle
- 16 Inch Wheel
- 16-1/2 Inch Wheel
- 17 Inch Wheel
- 17-1/2 Inch Wheel
- Dexter
more information >
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