What would cause the air conditioner heater cruise control and automatic headlights to work intermittently on a 99 Olds Intrigue?

Answer 1

That's hard to say. The first thing I would do is to unhook the ground cable, then go to the main fuse box under hood ( it may be called power center, etc.,). Under the fuse center there are screws that hold the center together, and if they become loose, you will have problems with electrical circuits that are otherwise not at all related. there is also a junction box where the circuits come thru the fire wall; I would check these too. I hope you get it fixed. I'll bet your headlights will stay on if you turn them on manually, using the switch at the end of the turn signal lever. I've got TWO 1999 Intrigues, and both had this same problem. When the first one developed the headlight/air conditioner problems, I thought it might be the Automatic Dual Zone Climate Control mechanism, but, since it's an electrical part costing $560.00, I decided to swap the unit between the two cars. Am I glad I didn't spend the money, because that wasn't the problem. I finally took the car to the dealer for diagnosis. They told me it was a bad ignition switch. I bought the part (about $90), replaced it (a big job), and everything's been fine since then. When the second Intrigue's cruise control quit working, I didn't associate it with the same type of problem. Then, my heater wouldn't change from floor to vent, and then the headlights would come and go. I replaced the ignition switch in this car, too, and all the problems went away. Why would Oldsmobile route everything through the ignition system?