SPEAKER FADER CONTROL INOP. CROSS-CAR HARNESS MISWIRED

VEHICLES AFFECTED: 1987 ELDORADOS AND SEVILLES

Some 1987 Eldorados and Sevilles equipped with the ETR radio system (non-Bose) may experience unusual fader control operation. Volume from all four speakers may be present when the fader control is moved all the way to the "front" or "rear" position and no speaker volume when set in the middle position.

Vehicles that may be affected and are equipped with a power passenger seat, option ACI, are:

Eldorado - HU600001 through HU605991 Seville - HU800001 through HU804444

Vehicles that may be affected and are not equipped with a power passenger seat, option ACI, are:

Eldorado - HU600001 through HU610964 Seville - HU800001 through HU808810

This condition may be due to the cross-car radio harness being miswired. To corrrect this condition, it may be necessary to re-pin the eight-way radio connector and the eight-way cross-car connector that it connects with according to the following procedure.

1. Disconnect the battery.

2. Access and disconnect cross-car to radio harness connection located within the center console. See Figure 1.

3. Back-out the terminal pins in the cross-car connector and reinstall them in the following manner:

a. Move circuit 200, a light green wire, from cavity H to cavity G. b. Move circuit 117, a dark green wire, from cavity G to cavity C. c. Move circuit 46, a dark blue wire, from cavity C to cavity H. d. Move circuit 116, a yellow wire, from cavity B to cavity E. e. Move circuit 118, a gray wire, from cavity E to cavity F. f. Move circuit 201, a tan wire, from cavity F to cavity B.

The finished pin-out in the connector should be:

Cavity Circuit Color ------ ------- ----- A 199 Brown B 201 Tan c 117 Dark Green D 115 Light Blue E 116 Yellow F 118 Gray G 200 Light Green H 46 Dark Blue

4. Re-pin the radio harness connector so that the wire colors at each cavity match the cross-car harness connector.

5. Reconnect the battery.

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.