Troubleshooting Hints

1. CHECK condition of RADIO Fuse 17, RADIO BATT Fuse 19, and CIG LTR Fuse 13. If fuse(s) is open, LOCATE and REPAIR source of overload. REPLACE fuse(s).
^ CHECK for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a Continuity/Voltage Check with a system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should be checked by monitoring for a voltage drop with the system operational (under load).
^ CHECK for proper installation of aftermarket electronic equipment which may affect the integrity of other systems. Refer to "General Troubleshooting Procedures". Diagnostic Aids
2. CHECK Instrument Panel Lamps. If inoperative, REPAIR before proceeding with Radio Lamp diagnosis.