Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Grounding Point: Customer Interest
Radio - Alternator Noise Whine Left Channel
Number:
86-22
Section:
8A
Date:
JAN., 1986
Subject:
RADIO NOISE ALTERNATOR WHINE LEFT CHANNEL
Modal and Year: 1985-1986 PASSENGER CARS AND LIGHT DUTY
TRUCKS WITH MODEL 2000 VF (VACUUM FLORESCENT) DIGITAL DISPLAY RADIO
TO:
ALL CHEVROLET DEALERS
The ground wire used in the instrument panel harness may cause a ground loop that may result in alternator whine heard in the left
channel of the radio.
If alternator whine is heard, remove the ground lead (black wire) from the black 4-pin connector in the back of the radio. If the
alternator whine disappears, correct the condition by doing the following:
1.
Cut the black ground lead in the black connector.
2.
Attach one end of the 16 gauge wire to the chassis of the radio and the other end to a good ground close to the radio, such
as the accelerator pedal bracket. When attaching the wire to the radio chassis, use one of the chassis case screws or a
mounting lug.
3.
Reconnect the radio.
This will not eliminate all alternator whine conditions.
