93 Buick Century Trunk Light

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=50840
Printed Date: July 15, 2025 at 7:32 PM

Topic: 93 Buick Century Trunk Light

Posted By: spokman
Subject: 93 Buick Century Trunk Light
Date Posted: February 25, 2005 at 3:14 PM

I'm trying to set my alarm to go off when the trunk is opened but for the life of me I can't figure out how Buick makes the light in the trunk go on. There is one wire that is orange going to the light. It does not goto any switch that I can find. That's it. No swich on the trunk. Light is grounded. I'm baffled. How does the light know when the trunk is open. I'm tempted to lock myself in the trunk and see if the light really goes off!! LOL!

Thanks!!

Replies:

Posted By: brcidd
Date Posted: February 25, 2005 at 4:03 PM

I know the '91 Riviera uses a switch right at the trunk pull down latch- so check there- or look in side the light lens- could be a mercury switch inside it....

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Brcidd - Engineer That Does Remote Starter Installs on the side.

Posted By: spokman
Date Posted: February 25, 2005 at 10:34 PM

Thanks, I'll just have to keep looking. Crazy Buick. I swear at the engineers constantly and pray for the day when I own a Toyota.

Posted By: CutDog504
Date Posted: February 26, 2005 at 12:06 PM

Its similar to a mercury switch. Is it a light socket screwed directly to the trunk lid? There is a metal ball inside the actual light socket that rolls when the trunk is opened. When it moves, it makes the electrical contact to turn on the light. To prove this, you can unscrew the light from the trunklid and connect a jumper wire to ground it. Then move it around and you will see that it will turn off when lying horizontal, but turn on when you tilt it. So basically, you cant tap in to use it as a trunk trigger. You have to install a mercury switch or a pinswitch.