However, there isn't a single "main relay" in the same way some vehicles have a large, easily identifiable relay. The PDC houses several relays that control various major systems. You'll likely need to consult a wiring diagram specific to your 1992 Jeep Wrangler 2.5L to identify the relay responsible for the specific function you're troubleshooting. A Haynes or Chilton manual for your year and model would be helpful.
