A2 SUBSTITUTE SPEAKER AND BYPASS SPEAKER WIRING HARNESS

• Unplug radio from speaker wiring harness. Set radio balance and fader controls to their mid-position. Using a speaker of known good quality, jumper the pins corresponding to the suspect speaker of the radio connector to the test speaker.

• Is sound OK?

GO to A3.

No
REMOVE radio for service.

 

A3 SUBSTITUTE SPEAKER USING SPEAKER WIRING HARNESS

• Reconnect radio to speaker wiring. Disconnect suspect speaker from speaker wiring harness and connect test speaker of known good quality.

• Is sound OK?

Yes
REPLACE speaker.

No
SERVICE speaker wiring harness.

 

PINPOINT TEST B: BUZZING SOUND FROM SPEAKER

 

B1 CHECK FOR FOREIGN MATERIAL IN SPEAKER CONE

• Is there foreign material in speaker cone?

Yes
REMOVE speaker, CLEAN foreign material. INSTALL speaker. RETEST system.

No
GO to B2.

 

B2 CHECK SPEAKER MOUNTING HARDWARE

• Is speaker mounting hardware tight?

Yes
REPLACE speaker.

No
TIGHTEN mounting hardware. RETEST system.

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