RADIO DIAL INDICATOR BINDING DISTORTION IN REAR SPEAKERS

SOME 1982 CIMARRON RADIOS MAY EXHIBIT A CONDITION WHERE THE RADIO MANUAL TIMING MECHANISM MAY BIND OR STICK, PREVENTING MOVEMENT OF THE DIAL INDICATOR. THIS BINDING CAN BE CAUSED BY ONE OR A COMBINATION OF THE FOLLOWING: 1.RADIO INSTALLED TOO TIGHTLY IN THE INSTRUMENT PANEL. 2.LOOSE DIAL ILLUMINATION BULB MOUNTING CLIP THAT CAN PERMIT THE BULB TO INTERFERE WITH THE DIAL INDICATOR MECHANISM. 3.AN INTERNAL CONDITION. TO CORRECT A RADIO EXHIBITING THIS CONDITION, PERFORM THE FOLLOWING PROCEDURE: 1.REMOVE RADIO FROM INSTRUMENT PANEL. 2.POSITION DIAL LIGHBULB ON THE TOP COVER BY SLIDING THE LIGHTBULB'S MOUNTING CLIP INTO ITS LOCATING SLOT, SHOWN IN THE ILLUSTRATION BELOW. 3.SECURE THE LIGHTBLUB IN THIS POSITION BY APPLYING A TWO INCH PIECE OF ELECTRICAL TAPE ACROSS ITS MOUNTING CLIP AND THE OUTSIDE OF TOP COVER, SHOWN IN THE ILLUSTRATION. 4.WHILE THE RADIO IS STILL OUT OF THE INSTRUMENT PANEL, CHECK MANUAL TUNING MECHANISM FOR PROPER FUNCTIONING. IF THE BINDING CONDITION STILL EXISTS, RETURN THE RADIO TO THE NEAREST AUTHORIZED DELCO RADIO REPAIR CENTER FOR FURTHER SERVICE. IF THE BINDING CONDITION IS ELIMINATED, INSPECT MOUNTING BRACKETRY FOR PROPER ALIGNMENT AND REINSTALL THE RADIO. * ILLUSTRATION * CONDITION: THE REAR SPEAKERS ON A SMALL NUMBER OF 1982 J2000 STATION WAGONS MAY HAVE DISTORTION AT HIGH VOLUME LEVELS, OR LACK OF STEREO SEPARATION. CAUSE: THE FOUR-WAY CONNECTOR AT THE REAR SPEAKER HARNESS IN THE TAILGATE HAS THE WIRES MIS-INDEXED IN THE CONNECTOR. CORRECTION: 1.VERIFY THE CONDITION BY TURING THE FRONT-REAR SPEAKER CONTROL (F-R ) FULL REAR. TURN THE VOLUME UP, AND TURN THE LEFT-LIGHT BALANCE CONTROL (L-R) BACK AND FORTH. THE SOUND SHOULD BE DISTORTED IN THE CENTER, AND GET CLEARER AT FULL LEFT OR FULL RIGHT POSITIONS. THERE SHOULD BE NO DIFFERENCE IN SOUND IN THE TWO CHANNELS (NO STEREO SEPARATION). 2.REMOVE THE RADIO. REMOVE THE BLUE CONNECTOR (REAR SPEAKER WIRING) FROM THE RADIO. REMOVE THE WIRES FROM THE CONNECTOR (FIGURE 1), AND REPLACE AS SHOWN IN FIGURE 2. THIS INDEXES THE SPEAKER WIRING TO OVERCOME THE INCORRECT WIRING IN THE REAR SPEAKER HARNESS. 3.REPLACE THE RADIO AND VERIFY NORMAL SPEAKER OPERATION.

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.