To stop the buzzing sound you will need to disconnect the buzzer. It is normally red plastic and located near the steering column at the top of the brake pedal mount.
i had same problem on my 94 cutlass supreme...long story short, it was the ignition switch. $300. at shop.
It is built into the headlight switch.
rightside bottom of steering column
Is located under the coil packs
under the coils
On under the hood on the driver's side of the car right behind the headlight assembly.
Replace ignition module (under the distributor cap)
Is this a sedan or coupe/convertible? The sedans had the common setup and the coupe/convertibles had the mini-quads.
Replace headlight switch- dimming rheostat may be loose
The ignition wire diagram for a 1985 Cutlass Supreme 2-door, can be found in a Chilton's Automotive Repair Manual. This manual can be purchased at many automotive parts stores, or found in some libraries.
Stick the starter in the cutlass supreme.
Oldsmobile Cutlass Supreme was created in 1966.