Radio - Noise
83olds4SUBJECT RADIO NOISE WITH 5.0L V-8 ENGINE NUMBER: 83-T-19
DATE: Oct 10, 1983
MODELS/YEARS 1983 CUTLASS SUPREME, 88,
98 AND TORONADO SECTION: 9
CONDITION
Some 1983 Oldsmobiles equipped with a 5.0L V-8 engine may have generator feedback noise during high charge rate periods. The condition is most noticeable on manually tuned radios and is due to the routing of the generator output to the battery.
CORRECTION
The generator noise can be eliminated by routing a generator-battery lead directly to the battery, rather than going to the starter motor first. This allows the battery to filter generator output directly. To correct this condition install a new positive battery cable with a generator to battery feed wire spliced into the terminal end of the cable and connected to the "BAT" terminal of the generator. It is not necessary to remove the original wire from the generator output (BAT) terminal. However, a ring terminal will have to be installed on the generator lead of the new positive battery cable assembly (except the Toronado cable assembly which has a ring terminal). See diagram..
PARTS INFORMATION
Cable Usage Part Number
88-98 08914139
Toronado 12027918
Cutlass Supreme 08919886
Ring Terminal - If Required
WARRANTY INFORMATION
Use applicable battery cable R & R labor operation and part number with trouble code 92.
TO ALL OLDSMOBILE DEALERS
SUBJECT: Effect of Proper Engine Adjustments on Power Brake Pedal Effort - 1980 "X" Body Vehicles Equipped with L-4 Engines
Reports of hard brake pedal feel, increased brake pedal effort, or reduced brake effectiveness are often related to low intake manifold vacuum. Intake manifold vacuum levels are affected by curb idle speed, A/C idle speed, ignition timing, and carburetor air/fuel mixture ratio.
The importance of correct diagnosis and timely correction of vehicles coming into your dealership as a result of power brake vacuum related complaints cannot be overemphasized.
For your convenience, attached is a reference copy of a previously issued Service Technical Bulletin which addresses this subject together with a step-by-step diagnostic guide and adjustment procedure.
It has been well demonstrated that proper application of this procedure will correct any power brake complaints related to reduced manifold vacuum levels associated with engine misadjustments on these vehicles. Furthermore, it is Oldsmobile Division's position that no complaint vehicle requiring this service should be returned to an owner prior to satisfactory correction of the problem.
Should you encounter any difficulty in the application of this adjustment procedure in achieving the satisfactory resolution of a complaint, contact your zone office for assistance.
K. R. Hummel Asst. General Sales ManagerService