Audio System Testing

WARNING: ON VEHICLES EQUIPPED WITH AIR BAGS, REFER TO AIR BAGS AND SEAT BELTS/AIR BAGS BEFORE ATTEMPTING STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY.

CAUTION: The speaker output of the radio is a "floating ground" system. Do not allow any speaker lead to short to ground, as damage to the radio may result.

1. Check the fuse(s) in the fuseblock module and the Power Distribution Center (PDC). If OK, go to Step 2. If not OK, replace the faulty fuse(s).
2. Check for battery voltage at the fuse in the PDC. If OK, go to Step 3. If not OK, repair the open circuit as required.
3. Turn the ignition switch to the On position. Check for battery voltage at the fuse in the fuseblock module. If OK, go to Step 4. If not OK, repair the open circuit as required.
4. Turn the ignition switch to the Off position. Disconnect and isolate the battery negative cable. Remove the instrument cluster bezel. Remove the radio, but do not unplug the wire harness connectors. Check for continuity between the radio chassis and a good ground. There should be continuity If OK, go to Step 5. If not OK, repair the open circuit as required.
5. Connect the battery negative cable. Turn the ignition switch to the On position. Check for battery voltage at the fused ignition switch output circuit cavity of the left (gray) radio wire harness connector. If OK, go to Step 6. If not OK, repair the open circuit as required.
6. Turn the ignition switch to the Off position. Check for battery voltage at the fused B(+) circuit cavity of the left (gray) radio wire harness connector. If OK, replace the faulty radio. If not OK, repair the open circuit as required.