Check the Hazard warning switch
Bulbs blown/Brake lamp switch inoperative
Had the same thing happen on a '73 SB. It turned out (after much cussing) to be the ignition switch. Try replacing the switch with an OEM and "see" what happens!
What year and model? Under what conditions? The dash lights are designed to stay on in certain models. Saab 900s from about 1987 on will have dash lights come on any time the ignition switch is in the ON position, whether or not the headlight switch is turned to ON.
All of the lights are turned on and off by the rotating part of the turn signal lever. The fogg lights are tuned on by the bottem left switch on the center panel left row. All lights for night driving is automatic if the rotating end of the turn signal is turned clock wise until it stops. If the switch is turned one stop counter clockwise it turns on the head lights. A buzzer will sound if you turn off the car and open the door without turning switch back to auto position or turning the switch counter clock wise until it stops at the off position.
Brake Light switch works without the ignition on. unplug the brake pedal switch and check to see if the brake lights are still on..switch could be defective
When you have your head lights turned on (the switch turned to the right all the way), pull that same switch out towards you
bad ignition switch - inside steering column
I had the same problem with my 98 buick regal gs and it turned out to be the ignition switch.
The rear lights of your car will still on even if your car was off because the switch was turned on and it will still remain on until the battery's out. Another possibility, if the headlight switch is off and the ignition switch is off, the brake light switch may be out of adjustment or broken and what you're seeing is the brake lights on.
Between your steering wheel and your instrument panel on your steering column, you will find a small rocker switch that controls the parking lights. I can't tell you why it is there, but it does turn the parking lights off and on independent of the ignition and headlight switch.
It could be a combination of two simple problems. First, check that your parking light switch on the top of your steering column is OFF, as this will keep the lights on even if the ignition switch is off. I believe this switch is necessary because your lights turn off automatically when you turn of the engine (ignition switch) Aslo, you must check your (combination tail light and brake light) rear bulbs as this could cause the break and tail lights to remain on when the car is started (ignition is on). GOOD LUCK !