Chrysler Full-Size Trucks 1997-2000 Repair Guide

Circuit Breakers


The junction block at the left end of the instrument panel can accommodate up to two circuit breakers. These are used to protect power windows and power seats, if fitted.

Circuit breakers will interrupt the circuit in the event of a short circuit or an overload condition caused by an obstruction to free movement of the window or seat, which would tend to overheat the motor.

The circuit breakers are automatically reset when the failure corrects itself, however, that does not mean that the problem is repaired. If a circuit has a motor that is going bad, the resistance will be high and eventually the circuit breaker trips and power is shut off to the circuit. When the circuit cools down, and the circuit breaker works again, so will the windows or seats, however the breaker will trip again when the resistance builds.

Circuits that might be needed in case of an emergency or to operate the vehicle (like the power door locks) have circuit breakers instead of fuses.


Circuit breakers are automatically resetting. No attention is necessary in the event of activation.

A circuit breaker, if defective, is replaced exactly like a fuse.

  1. On air bag-e quipped vehicles, disconnect the battery negative cable(s) and wait two minutes from the air bag capacitor to discharge.
  3. Locate the correct circuit breaker in the junction block.
  5. Pull the circuit breaker out slightly, but leave the circuit breaker terminals connected to the terminals in the junction block cavity.
  7. Connect the negative lead of a 12-volt DC voltmeter to a good ground.
  9. With the voltmeter's positive lead, check both exposed circuit breaker terminals for voltage.
  11. If only one terminal has voltage, the breaker must be replaced.
  13. If neither terminal has voltage, the problem may lie in the circuit or the PDC.