Catalyst Warning System: Courier
- With ignition switch in the "ON" position, catalyst warning lamp should be activated, indicating that bulb and wiring are good. Start engine, warning lamp should go out. If lamp does not go out, turn ignition switch to "OFF" position and tilt seat back forward.
- Disconnect catalyst thermo sensor electrical connectors, which are located on the floor behind the seat. Using an ohmmeter, check circuit on thermo sensor side of wiring. Replace sensor if reading indicates no continuity. Reconnect wire and repeat test.