Troubleshooting Trailer Brakes with New Electrical Wiring and Brake Assemblies

Updated 10/10/2018 | Published 10/09/2018

Products Featured in This Question

Hook Probe Circuit Tester

(72)

$13.14

Digital Multimeter with 42" Long Test Leads - LED Display

(3)

$23.42

Question:

I adjusted the trailer breaks and they will not hold up. Someone said it’s hub and drum kit. The breaks are almost new everything on them is perfect and electrical is all new what’s the number I should get to the break lines. If I put a tester to it. Info would be great also this trailer is a car hauler 51 foot.

asked by: Jonathan G

Expert Reply:

It sounds like you are asking about the amperage and you will want 15.0 to 16.3 amps at 12-13 volts if your have a tandem axle trailer. If you have a triple axle trailer you will want 22.6 to 24.5 amps at 12-13 volts. I've attached an article to further assist when using a multimeter like # PT89ZR.

You will also want to make sure you have bare metal to metal grounds on each magnet to the trailer frame.

expert reply by: Jason S