Troubleshooting Hints

1. Check RDO1/AUX Fuse by noting operation of the Radio.
2. Check CTSY Fuse.
3. If all Courtesy Lamps remain on at all times, disconnect each Jamb Switch until the Courtesy Lamps turn "OFF." Replace the defective switch. If Courtesy Lamps remain "ON" after all Jamb Switches are disconnected, repair short to ground in CKT 156.