1999 Buick Park Avenue System Wiring Diagram

Since engine light is on I would suggest retrieving the trouble codes if at all possible. This will normally pinpoint the culprit. In this case, I would not be surprised if the PCM is at fault causing these electrical issues. I do have wiring diagrams but will need to know which system in specific you want it for (i.E. Exterior lights, power windows etc.)

Here is the trunk release wiring, i am working on the interior lights still. .

I will need your email so I can send the interior light wiring there, it is too big to fit here and read but i have posted below anyway..

Email sent, let me know if you need any more help

Hi Mike. You need to start a new question specific to your vehicle. Unlike on other sites where anyone can chime in to confuse the issue, here it becomes a private conversation with one or two experts who will stick with you until a solution is found. Only the people involved get automated e-mails with links directing them back here when a reply is posted, and since this is over 14 years old, it's a safe bet neither party is still around. No one else will see your addition or have a chance to help you. I just happened upon this post while waiting for someone else to post a follow-up.

I don't know how the diagrams were posted 14 years ago, but today, I can post them from AllData, an online service manual provider. They can still be hard to read due to size, but you can copy and paste them into a typing program like MS Word where it's very easy to enlarge them and add notes. I can help you do that if necessary.

Here's the link to start a new question:

https://www.2carpros.com/questions/new