-30-
Breakaway test procedure - do not leave the breakaway switch pulled for
more than two minutes during any of the steps outlined below
1. Pull the breakaway switch on the trailer.
2. If the unit runs and builds pressure, that indicates the actuator is
functioning properly. The problem most likely is a defective electronic
brake controller in the tow vehicle or defective wiring between the tow
vehicle and the E/H brake actuator.
3. If the unit runs but will not build pressure, the problem most likely is
a defective solenoid valve in the E/H brake actuator and the actuator
should be replaced.
4. If the unit still does not run after the breakaway battery is fully charged,
verify that the voltage between the white wire and yellow wire is at least
12 volts.
5. If the voltage is less than 12 volts, either the breakaway switch or the
breakaway wiring is defective.
6. If the voltage is greater than 12 volts, the E/H brake actuator should be
replaced.
Trailer brakes too aggressive
1. Reduce the gain setting on the in-cab electronic brake controller.
Braking Systems - Hydraulic
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