Security light stays on - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-27-2005, 02:14 AM   #1
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Default Security light stays on

Is the security light supposed to stay on
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Old 07-27-2005, 07:11 AM   #2
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Old 07-27-2005, 09:34 AM   #3
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no......ok
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Old 07-27-2005, 09:36 AM   #4
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no......ok.....tks..........but is there a reason for this I can't seem to find out why its on
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Old 07-27-2005, 10:29 AM   #5
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I can give you more information once I'm reunited with my FSM in about 8 hours. Sorry about the bluntness...it was a poor attempt at early morning humor.
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Old 07-27-2005, 11:51 AM   #6
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I'm assuming you have the SLE package. Check the trunk lid. After you remove the carpet, you'll see a cable coming from the trunk lid lock cylinder to a small white connector and wiring harness. Disconnect the harness, and see if the light goes out.
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Old 07-27-2005, 03:59 PM   #7
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thats exactly what it was on my 90 when the light stayed on.
I unplugged the trunk lid connector and its working great since.
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Old 07-27-2005, 10:18 PM   #8
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Thanks guys I'll try that.............seems one thing after another since this guy put this new motor in...............oh ya my rad fans stay on all the time even with the key on and not running still trying to figure this one out too..............thanks again
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Old 07-28-2005, 12:03 AM   #9
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Fans are on without the key running. There are two relays for fans in the maxifuse relay cernter for the fan operation. One controls low speed and one controls high speed.

They operate normally when the PCM sends a ground to the relay. PCM sends ground to the low speed when it sees temp of 215. PCM sends ground to the high speed when the A/C is turned on or it sees temp of 225.

The power should be switched and therefore even if they were grounded they should not be on w/o the key in the run position.

Look for added wires and or obvious things that have been changed.
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Old 07-28-2005, 12:04 PM   #10
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Rats. Read this post and thought I had a solution.

My security light has been on 6 months.

Pulled the connector mentioned.

It'* still on.
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