BUZZ/WHINE NOISE OVER BOSE SPEAKERS WITH RADIO OFF

MODELS AFFECTED: 1989 ELECTRA/PARK AVENUE

Some 1989 Electra/Park Avenues equipped with the Bose sound system, may experience a whine or buzz noise over the speakers with the radio turned off. This condition may be due to a shorted Bose amplifier relay supplying power to the speakers (turning them on).

To diagnose a vehicle with this condition, remove the Bose amplifier relay (relay "B" in the relay center) while the condition is present. If the noise is eliminated, measure the voltage at all four terminals of the relay socket. There should only be voltage at terminal I when the radio is off.

If there is voltage at more than one terminal, there is a short to voltage on the associated circuit. Repair circuit. Refer to Section 8A of the Service Information Manual.

If there is only voltage at terminal 1, replace the Bose amplifier relay.

WARRANTY INFORMATION

Labor Operation Number: R0870 Labor Time: 0.2 Hour Trouble Code: 92

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.