Jeep 1996 Grand Cherokee Service Manual page 333

8F - 4 AUDIO SYSTEMS
DIAGNOSIS AND TESTING (Continued)
CONDITION
NO AUDIO.
NO DISPLAY.
NO MEMORY.
POOR RADIO
RECEPTION.
NO/POOR TAPE
OPERATION.
NO COMPACT DISC
OPERATION
Audio System Diagnosis
POSSIBLE CAUSE
1. Fuse faulty.
2. Radio connector faulty.
3. Wiring faulty.
4. Ground faulty.
5. Radio faulty.
6. Speakers faulty.
1. Fuse faulty.
2. Radio connector faulty.
3. Wiring faulty.
4. Ground faulty.
5. Radio faulty.
1. Fuse faulty.
2. Radio connector faulty.
3. Wiring faulty.
4. Ground faulty.
5. Radio faulty.
1. Antenna faulty.
2. Ground faulty.
3. Radio faulty.
1. Faulty tape.
2. Foreign objects behind tape door.
3. Faulty tape deck.
1. Faulty CD.
2. Foreign material on CD.
3. Condensation on CD or optics.
4. Faulty CD player.
CORRECTION
1. Check radio fuses in fuseblock module.
Replace fuses, if required.
2. Check for loose or corroded radio
connector. Repair, if required.
3. Check for battery voltage at radio
connector. Repair wiring, if required.
4. Check for continuity between radio
chassis and a known good ground. There
should be continuity. Repair ground, if
required.
5. Exchange or replace radio, if required.
6. See speaker diagnosis, in this group.
1. Check radio fuses in fuseblock module.
Replace fuses, if required.
2. Check for loose or corroded radio
connector. Repair, if required.
3. Check for battery voltage at radio
connector. Repair wiring, if required.
4. Check for continuity between radio
chassis and a known good ground. There
should be continuity. Repair ground, if
required.
5. Exchange or replace radio, if required.
1. Check ignition-off draw fuse. Replace
fuse, if required.
2. Check for loose or corroded radio
connector. Repair, if required.
3. Check for battery voltage at radio
connector. Repair wiring, if required.
4. Check for continuity between radio
chassis and a known good ground. There
should be continuity. Repair ground, if
required.
5. Exchange or replace radio, if required.
1. See antenna diagnosis, in this group.
Repair or replace antenna, if required.
2. Check for continuity between radio
chassis and a known good ground. There
should be continuity. Repair ground, if
required..
3. Exchange or replace radio, if required.
1. Insert known good tape and test
operation.
2. Remove foreign objects and test
operation.
3. Exchange or replace radio, if required.
1. Insert known good CD and test operation.
2. Clean CD and test operation.
3. Allow temperature of vehicle interior to
stabilize and test operation.
4. Exchange or replace radio, if required.
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