Test 106A - Poor Sound Quality From One Speaker

CAUTION: Always turn ignition off prior to disconnecting any module connector.

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagrams, see WIRING DIAGRAMS - 3.0L article in ENGINE PERFORMANCE. Perform TEST VER-1 after each repair.

Turn radio on. Gain access to radio amplifier. Disconnect amplifier 9-pin connector. Go to next step.

Using scan tool in voltmeter mode, check voltage on appropriate radio amplifier 9-pin connector positive (+) terminal for inoperative speaker. See AMPLIFIER 9-PIN CONNECTOR TERMINAL IDENTIFICATION table. If voltage is less than 5 volts, go to step 4). If voltage is more than 5 volts, go to next step.

AMPLIFIER 9-PIN CONNECTOR TERMINAL IDENTIFICATION

Terminal No.	Wire Color	Speaker Function
2	BRN/LT BLU	Left Rear (-)
3	BRN/YEL	Left Rear (+)
4	BRN/RED	Left Front (-)
5	DK GRN	Left Front (+)
6	VIO	Right Front (+)
7	DK BLU/RED	Right Front (-)
8	DK BLU/WHT	Right Rear (+)
9	DK BLU/ORG	Right Rear (-)

Check voltage on appropriate radio amplifier 9-pin connector negative (-) terminal for inoperative speaker. See AMPLIFIER 9-PIN CONNECTOR TERMINAL IDENTIFICATION table. If voltage is less than 5 volts, go to next step. If voltage is more than 5 volts, replace amplifier.
Gain access to back of radio. Leave connectors connected. Using scan tool in voltmeter mode, check appropriate faulty positive (+) or negative (-) circuit. See RADIO CONNECTOR TERMINAL IDENTIFICATION table. If voltage is more than 5 volts, repair appropriate open circuit. If voltage is less than 5 volts, replace radio.

RADIO CONNECTOR TERMINAL IDENTIFICATION

Terminal No.	Wire Color	Speaker Function
Black Connector
2	BRN/YEL	Left Rear (+)
3	DK BLU/WHT	Right Rear (+)
4	DK GRN	Left Front (+)
5	VIO	Right Front (+)
6	BRN/LT BLU	Left Rear (-)
7	DK BLU/ORG	Right Rear (-)
Gray Connector
2	BRN/RED	Left Front (-)
3	DK BLU/RED	Right Front (-)