Possibly a bad ground in the rear wiring harness somewhere.
Underneath the glove compartment. By that, I mean you have to pull out the plastic lining in the glove compartment. Stupid, huh?
turn signal flasher
did you check the fuse?
With the lights on pull on the turn signal lever. High beams should come on. Pull again and they should go off.
The brake light switch must be broken or out of adjustment. The switch is located above the brake pedal. what if it don't cut off
Replace flasher(S) under dashboard located near brake and gas pedal areas of car They are round /cylindrical style and pull like a regular home extension cord.Turn signal lights on and listen for click noise .replace bad one or both.Very inexpensive
Put the car in drive, unbuckle, and floor the gas pedal. The lights will turn on as needed.
The meaning of a dashboard warning light on an Oldsmobile Intrigue could be a variety of things. There are different lights for different things for different years of that model. It could be a service engine, check oil, sensor check, or more. The owners manual should have a listing of warning lights included in it.
Look above the brake pedal on the rod that holds the pedal. There is a button that engages when you depress the pedal to activate the lights. Your parts store will have a replacement and can show you how it is attached.
I had a very similar problem on my 95 Oldsmobile cutlass supreme. After hours of pain staking work I finally found that a wire was loose. The wire is coated red and is beneath the fuse box on the drivers side directly behind the windshield wash tank. There is an eyelet on the end of the wire and one screw holding it in place directly under the fuse box. As soon as I tightened the screw my problem went away.
Is that a question? They work because that's the way your terrible car was designed to work? Do you mean HOW do they work?