Lippert Components Trailer Axle (8-12K) - Manual (Page 23)

Rev: 04.18.2014
Page 23
Trailer Axle 8-12K Owners Manual FULL
Amperage Chart
Low or no voltage are the most common problem with the Braking System. Amperage at the brakes is also
a relatively common issue. Common causes of these conditions are:
1. Low quality electrical connections
2. Open circuits
3. Insufficient wire gauge
4. Broken wires
5. Blown fuses (fusing of brakes is not recommended)
6. Short circuits (indicated by high amperage)
Possible causes of shorts are:
1. Shorted magnet coils
2. Bare wires contacting a grounded object
Finding the cause of a short circuit in the system is done by isolating one section at a time. If the high
amperage reading drops to zero by unplugging the trailer, then the short is in the trailer. If the amperage
reading remains high with all the brake magnets disconnected, the short is in the trailer wiring.
All electrical troubleshooting procedures should start at the controller. Most complaints regarding brake
harshness or malfunction are traceable to improperly adjusted or nonfunctional controllers. See your
controller manufacturer’s data for proper adjustment and testing procedures. For best results, all the
connection points in the brake wiring should be sealed to prevent corrosion. Loose or corroded connectors
will cause an increase in resistance which reduces the voltage available for the brake magnets.
Amps/Magnet Two Brakes Four Brakes Six Brakes
3.0 6.0 12.0 18.0