Question about 1991 Buick Park Avenue

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Headlights don't work at all, but all other lights work fine.

I have a 1991 buick park avenue, and suddenly the headlights quit working, but all other lights work fine. We checked the fuses, and we can make them work if we hard wire the lights direct to the positive battery post, but otherwise cant find any reason for the problem. They had been working fine and after driving around town one day and then leaving the car parked a couple hours, I had no lights when I started the car again to go home. Also, today I discovered that the blower, which we had been having to manually plug in and unplug each time the car was driven, suddenly wont come on when it is plugged in now. Thus, I have no defroster or heater blower that works. What could be the cause for these issues and how can we fix it fast with as cheap a cost as possible? Where can I find a wiring diagram or schematic for this vehicle on-line? Thanks for any help you can give.

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If u have been jumping wires and such u may have burnt out a circuit, the next thing to test is the headlight swith, pull it out and look for overheated terminas and any melting of the connector to it, replace both connector and switch as ness.

Posted on Dec 12, 2008

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1 Answer

How to fix non working headlights


First check your fuses. If ok. Turn your headlight switch and see if rear parking lights turn on. If they do more than likely your headlight switch is not your problem. If running lights dont come on, check your headlight switch operation..

Feb 08, 2016 | 1991 Buick Park Avenue

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Can't get headlights to work on 1991 Buick Park AVE Ultra. All parking lights work fine.


So you have tested nothing.
Headlights don't usually have relays,just a circuit breaker in the light switch.
As I suggested,no one knows your problem,you need to actually start to do something. Get to the light switch and do some testing with a meter. It is either working or it isn't. If it is good then you could use a wiring diagram to continue on,or have a shop do this for you.

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try replaceing the headlight relay switch or the headlight multi function switch.

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Look in the fuse box. The cover should tell you with fuse is related to the headlights. That fuse might be a good place to start.

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there is no way to bypass it but the sensor is part of the headlamp assy i would check the relay to the p lights then go from there

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