Trunk light out - Chevy Impala SS Forum
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post #1 of 11 (permalink) Old 10-09-2018, 11:04 AM Thread Starter
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Trunk light out

On my 96 BBB, bone stock with 125K on the odo. Opened the trunk this morning and the light flickered depending on the position of the deck lid. Then nothing - light wasn't working. Drove to work, opened the deck lid once again, and the light pulsed on and off depending on deck position then went out again. I suspect it's not the bulb due to the intermittent behavior so then my next guess is the mechanism in the deck lid that keeps the light lit when open. Any guidance on this issue is greatly appreciated.
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post #2 of 11 (permalink) Old 10-09-2018, 11:11 AM
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Wiring near hinge can become pinched,and break inside insulation. Manipulate wiring by hand with deck lid open,and problem should reveal itself.

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post #3 of 11 (permalink) Old 10-09-2018, 11:15 AM
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My trunk light keeps blowing a fuse. I suspect I'll find an issue at the mercury switch area but just haven't had the time to dig into it yet.

1996 DGGM Impala SS
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post #4 of 11 (permalink) Old 10-09-2018, 11:39 AM
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Quote:
Originally Posted by 96bliss View Post
On my 96 BBB, bone stock with 125K on the odo. Opened the trunk this morning and the light flickered depending on the position of the deck lid. Then nothing - light wasn't working. Drove to work, opened the deck lid once again, and the light pulsed on and off depending on deck position then went out again. I suspect it's not the bulb due to the intermittent behavior so then my next guess is the mechanism in the deck lid that keeps the light lit when open. Any guidance on this issue is greatly appreciated.
As 1slow mentioned, I'd be inspecting the wiring carefully in this area. I think the wire going in and out of the Mercury switch can also be compromised and the switch itself good.

Really not a whole lot to this circuit, just need a good ground and then power going into the Mercury switch. If you have a DVM and the ability to use it, should find the issue pretty quick and suspect it's just a broken wire or ground. Pull the bulb socket and see it you're getting continuity from 1 of the bulb socket leads to ground. The other side of the socket should be giving you 12V and just work your way back from there.

Once you get it figured out, consider doing the Dual Trunk Light mod to the trunk. The underside of the package tray already has a provision for another Bulb setup and just a matter of splicing it in to the circuit. Really helps to light up the trunk area to have a bulb on the other side. Besides, its a mod so why not do it and make your car faster.

BTW - In my travels I have seen 2 types of Bulb sockets. 1 just has 2 metal legs that clip into the package tray and the Bulb stuck in the middle. the 2nd type is a much nicer setup with a square plastic lens that covers everything. found these years ago and added them to the trunk, can't remember if they were a caddy, roady caprice or All.

EDIT - a real OLD thread you may find useful....
https://www.impalassforum.com/vBulle...unk-light.html

================================================== =============


'95 Caprice SS conversion - Bonny Buckets - 96 Column, Shifter and Console - 3.73 Gear and Herter tune - Z/28 Cluster - Blazer OH Console - Green/Pink bushings - Chromed Impala Wheels - Eibach Springs and Bilstein Shocks - Corvette Engine Dress - the list goes on and still more to do...it never ends.

Last edited by 4DoorSS; 10-09-2018 at 11:45 AM.
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post #5 of 11 (permalink) Old 10-12-2018, 11:57 AM
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Wiring is probably the issue. Try wiggling the wires when the trunk is open. If the light is affected, try one wire at a time.

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For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
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post #6 of 11 (permalink) Old 04-09-2019, 09:47 PM
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Two years ago license plate light quit (the LED was fine). A month ago trunk courtesy light quit. The bulb is fine. Moved the wiring close to the hinge, but nothing changed. Cannot see the mercury switch. This is 95 Fleetwood.

Thereís nothing as permanent as a temporary solution.

1995 Cadillac Fleetwood Brougham 126,XXX miles.
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post #7 of 11 (permalink) Old 04-09-2019, 10:01 PM
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Quote:
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Two years ago license plate light quit (the LED was fine). A month ago trunk courtesy light quit. The bulb is fine. Moved the wiring close to the hinge, but nothing changed. Cannot see the mercury switch. This is 95 Fleetwood.
Check for a good ground. Standard troubleshooting techniques with a multimeter apply.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
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post #8 of 11 (permalink) Old 04-09-2019, 10:05 PM
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Quote:
Originally Posted by Fred Kiehl View Post
Check for a good ground. Standard troubleshooting techniques with a multimeter apply.
Thank you. Last summer there was a lot of moisture inside of the trunk. That could affect connection, but the only ground I can see inside of the trunk is perfect - no rust at all.

Thereís nothing as permanent as a temporary solution.

1995 Cadillac Fleetwood Brougham 126,XXX miles.
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post #9 of 11 (permalink) Old 04-09-2019, 10:19 PM
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It does not matter what anything looks like, check it.

1991 OCC 461 (.030 over 454) BBC, 3.23 posi, flash to pass, drop spindles & springs, Impala rims, Hydroboost, Recaros, MOMO/wood SW w/QR, custom wood shift knob, Pioneer DEH P77DH
1992 OCC now with 5.7 tbi, DEH P77DH
For a parts list, check https://www.impalassforum.com/vBulle...ion-parts.html
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post #10 of 11 (permalink) Old 04-09-2019, 10:21 PM
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Quote:
Originally Posted by Fred Kiehl View Post
It does not matter what anything looks like, check it.
I agree. Will check out.

Thereís nothing as permanent as a temporary solution.

1995 Cadillac Fleetwood Brougham 126,XXX miles.
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