1999 Buick Park Avenue Exterior Lights out and Horn on HELP

BUICK554

MEMBER
1999 BUICK PARK AVENUE
6 CYL
FWD
AUTOMATIC
90,000 MILES

99 Park Ave, First passenger taillight and parking light stopped getting power, but brake/turn lights work, then horn started coming on for no reason, now the daytime running lights lost power, and only one highbeam is getting power. Something electrical is going on, but what? Next to go will be my headlights and the rest of my taillights and I wont be able to drive the car at night.

5 Replies

IMPALASS

MECHANIC
3,112 POSTS

Hello -

To better assist you please let me know if your model is just the Park Avenue or the Ultra. Also your engine size in liter and the 8th digit of your VIN.

With that, how did this start, just all of a sudden or did you have an accident, or did someone work on it or did it just start to happen.

Next, to save us some time, please go to Auto Zone (AZ) or O'Reilly's (OR) and for FREE they can pull the codes to the car. Most important: Once they check your codes, if they find something and you don't get it fixed and need to get back with us, please make sure you tell us exactly what the code was, number and all. Example, if the code was E0568 O2 Sensor bad. Then make sure you give us all of that. While there for FREE also they can bring their tester out and check your battery and alternator. Since this obviously is an electrical problem we need to make sure all you power is operating correctly.

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Sunday, December 14th, 2008 AT 10:15 AM

BUICK554

MEMBER
3 POSTS

Ultra, Supercharged 3800, VIN I
The parking/taillight out started three or four weeks ago. The horn coming on started a few days ago, so I pulled the relay. It would just blow contantly for a few seconds up until a few minutes. While driving and while parked in the driveway with the car off. Then one daytime running light stopped, now both. Yesterday I only had one highbeam light come on when turned on. I dont believe that the highbeam light has two filiments. I think the daytime running light and highbeams are one in the same. With that thinking, as well as the passenger parking/taillight not getting power, I was thinking that the problem lies in a module or junction somewhere. Looking online at differant posts led me to LCM Lamp Control Module. BCM Body Control Module, Receiver for the RF remotes? I dont even know if my car has all of these.
As for being in an accident, possably. I have owned the car for two years and put about 40,000 miles on it, but before that is unknown. The front bumper cover is alittle out of adjustment so an accident can't be ruled out.
I do plan to take it to Autozone. I wasnt in a hurry to take it there as I wasnt sure how advanced their code reader is and I have no check engin light on.

Thank you for your quick reply and I will keep you informed.

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Sunday, December 14th, 2008 AT 10:52 AM

IMPALASS

MECHANIC
3,112 POSTS

Hello -

Thanks for the info.......I will start looking around at what I have.

While at AZ... Check the bulbs to see if two bulbs or one with two filiments etc. That would answer it for both of us.

Next, the accident..... Okay..... Nothing recent anyway....... So we can kind of rule out that causing anything and maybe something going bad.......

You don't necessarily need the light on for it to throw a code. It could have thrown it and the light not stay on. There could be a code from before you had it.

We are just basically gathering all the data we can to Lord willing, speed up the diagnosis and get you fixed.

Let me know the results of the codes and battery/alternator test.

Thanks, will be looking forward to hearing from you and have a great Sunday!

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Sunday, December 14th, 2008 AT 11:03 AM

BUICK554

MEMBER
3 POSTS

High beam/Day Time Running Light Same (ONE Filiment)
No Codes
No Problems with Charging System
Still Clueless!

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Sunday, December 14th, 2008 AT 2:49 PM

IMPALASS

MECHANIC
3,112 POSTS

Hello -

Okay..... That's progress......... No codes, charging sys okay.

Now are you 100% sure the bulbs are all good? The only reason I ask is I just replaced both low beams on a vehicle and the low/high are the same bulb. The parts person said they were having a rash of head lamps burning out.

So...I just want to make sure before we chase too many rabbits or wiring diagrams... Swap bulbs with a known good to be sure.

You said 1 high beam was getting power... Left or right?

Again, swap bulb and see what happens.