Testing

CAUTION: The CD changer/player will only operate between approximate temperatures of -23 degree Celsius and +65 degree Celsius (-10 degree Fahrenheit and +145 degree Fahrenheit).

Whenever a radio malfunction occurs;
1. First check FUSES in the instrument panel Fuse Block:
a. Fuse 4, Memory feed
b. Fuse 8, Illumination
c. Fuse 16, Ignition feed

NOTE: The vehicles are shipped with the memory/interior lamp fuse disconnected.

2. Verify, the radio wire harness and all ground straps are properly connected before starting normal Audio System Diagnosis table and repair procedures.

DIAGNOSTIC CONDITIONS
Noise Distortion In All Speakers
Does the distortion occur through all operations:
- AM and FM stations
- Cassette tape
- Compact disc

If not, check for radio interference, damaged tape or disc that may be causing the distortion. Refer to Sound Systems Operating Instructions in the Owners Manual for cleaning procedures of the cassette tape player.
- Check battery voltage, for 11 Volts or more
- Check amplifier connector for proper connection
- If OK, check radio, refer to Radio Diagnosis
- If OK, check for high resistance in B+ and ground to radio and amplifier.
- If OK, replace amplifier.

Electrical Noise Distortion In One Speaker
- Remove output signal C1 connector from amplifier and check for short to ground on the speaker with the distortion.
- If shorted to ground, disconnect speaker connector and recheck from the amplifier for short to ground.
- If still shorted to ground, repair wires. Not shorted to ground, replace speaker.
- If not shorted to ground, check speaker resistance at amplifier connector for two to five ohms.
- If resistance is OK, refer to Radio Diagnosis. If radio checks OK, replace amplifier.
- If resistance is less than 1.7 ohms (subwoofer) and 2 - 2.25 ohms (3 1/2 inch), replace speaker. If resistance is OK, repair wires.
- If resistance exceeds 5 ohms, check wiring and speaker for high resistance.

Mechanical Noise Distortion
- Check trim for loose parts, and speaker attachments for buzzes, repair as necessary.
- Remove speaker from its mounting. Connect the speaker connector and play radio. Listen for distortion. If distortion remains, replace speaker.

One Speaker Non-Operative
- Remove connector from amplifier and check for two to five ohms resistance to the non-operative speaker.
- If resistance is less than two ohms, test speaker for resistance and wiring for and open or short.
- If OK, refer to Audio Diagnostic Test Procedures. If not OK, replace speaker/wiring as necessary.

All Speakers Non-Operative
- Are the radio display lights on
- Radio not ON, refer to Radio Diagnosis
- Check fuses, amplifier connectors and wires for proper connection
- Check for good ground to radio and amplifier
- Check amplifier, for battery voltage, ON/OFF voltage, and ground
1. Battery voltage OK and NO voltage at the ON/ OFF terminal, check for short or open in the ON/ OFF circuit.
2. ON/OFF voltage OK, and NO battery voltage, check for short or open in battery circuit.
3. Prior to replacing amplifier check fuse 3 in the Fuse Block. If not OK, replace fuse. If fuse blows again disconnect amplifier B+ wire connector.
4. If fuse still blows the problem is not the amplifier. If fuse does not blow replace the amplifier.
5. If shorted or open circuit repair as necessary.
6. If voltage and ground at amplifier are OK, use a known good radio. If speakers are still inoperative, replace amplifier. If speakers are OK, replace radio.