TSB : Normal Operation

Details

The trailer electric brake controller is provided voltage at all times by the Battery Junction Box (BJB) fuse 18 (30A). The trailer electric brake controller receives voltage from the stoplamp switch when the brake pedal is applied. When a brake application is detected from the stoplamp switch, the trailer electric brake controller sends voltage to the trailer tow connector. This pinpoint test is intended to diagnose the following: Fuse Wiring, terminals or connectors Trailer tow connector Trailer electric brake controller Trailer