Grand Am Left Turn Signal Stays On In Reverse

pontiac-grand-am

1999 Pontiac Grand Am

Jack’s Question: When I take my 99 Grand Am out of park and put it in reverse my left turn signal indicator on the dash stays lit. Turn signal works fine when not braking. It just seems to have something to do with when I put the car in reverse because when I start the car and apply the brake to take it out of park the turn signal doesn’t stay lit on the dash, just when I put it in reverse. Is there some kind of sensor in the brake peddle or in the gear shift that can go bad?? I just don’t know where to begin?

Answer: You’re getting electronic feedback somewhere in the car. When you put the car in reverse, the reverse lights get electricity. Somehow this electricity is feeding back into the turn signal system, lighting up the turn signal indicator on the dash.
Have the electrical circuits checked in the trunk on the left side. You might have a bad circuit board on that side. And believe it or not, I’ve seen people have the wrong bulb installed back there, and it will cause short circuits and make other lights come on.
So make sure you have the original equipment correct bulbs back there (check the right side to make sure both sides have the same exact bulbs in them.) Hopefully one of these procedures will fix it, because your Pontiac also has a small computer on board, called the general electrical module (GEM) and they can go bad. Unless you’re an electrical mechanic, you won’t be able to check this GEM and they are pretty expensive to just guess with.
A bad GEM can also cause one electrical system to operate another one when its circuit boards short out internally. Good Luck.

 

 


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