Question about 1990 Geo Prizm

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I'm having an unusual problem with a 1990 Geo Prizm. When I step on the brake the brake light comes on in the rear. When I turn on the lights the brake light goes out if I'm holding the brake pedal down. If I turn on the lights and then hit the brake pedal the brake lights will not come. I believe the brake switch is fine because the brake lights come on when I step on the brake with the lights off. I can't find a fautly fuse. I took the light assembly appart and also noticed that there are three bulbs. The brake light is the inner most bulb on each side. The outer most bulbs come on when the lights are turned on. There is a middle bulb which never lights on either side. I can't figure out what the problem is.

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Make sure you have the right bulbs in the right place...Sometimes they will fit, even though they are not right...Your brake light bulb should be a two filiment bulb...If it is one , then there goes your problem...Now if your bulbs are interchangable, go ahead an swap them around, and see what happens...Goodluck....

Posted on Dec 12, 2009


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