Trunk trigger help!

'84 Buick LaSabreIt has a light in the trunk (gnd by trunk lid).One wire leading to bulb. Tapped wire leading to bulb - reads +12v The problem is that it reads +12 all the time even with the trunk closed and the light off.Any ideas?I really do not want to run a pin-switch but at this rate I think I'll have to.

There should be another wire that leads to the light casing. Tap into this wire because it is the trigger wire .Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

the light itself might have a sealed mecury type switch that you cannot tap into.Ruben

Innovative Sounds

Phila., Pa.

hello...new here...but the problem you are encountering is a reed-like piece of metal that makes ground when the trunk lid is opened.  the wire will read 12VDC on your meter/test light because you are completing the circuit.  is the light housing attached to the chasis of the car?  is there a plug that goes into it? try giving that bulb a separate ground and see if it turns off when the door is closed.  might be the only option left to run a pin switch.  you could try a micro switch from radioshack and place it where the weather-strip meets the lid. if you want to get fancy, (might not be cost efficient for mass production) but you could also go with a magnetic reed switch.It's better to ask a "STUPID" question...than to know a "STUPID" answer. :-)