BE/Body Electrical Systems — Woofer Speaker Does Not Work, page 108

BE–108
BODY ELECTRICAL SYSTEM – AUDIO SYSTEM

29  Amplifier  WOOFER SPEAKER DOES NOT WORK

Is power amplifier operating normally?
Yes  Radio receiver assembly faulty.
No
Is hiss produced by non–functioning speaker?
Yes  Radio receiver assembly faulty.
No
Is there continuity in speaker wire harness?
No  Speaker wire harness faulty.
Yes
Temporarily install another speaker.
Functions OK?
Yes  Speaker faulty.
No
Woofer amplifier faulty.

30  Noise  NOISE PRODUCED BY VIBRATION OR SHOCK WHILE DRIVING

Is speaker properly installed?
No  Install properly.
Yes
Is each system correctly installed?
No  Install properly.
Yes
With vehicle stopped, lightly tap each system.
Is noise produced?
Yes  Each system faulty.
No
Noise produced by static electricity accumulating in the vehicle body.