The Security light does not work properly, instead it comes on a random times while I am driving. Also the Instrument panel works intermittently as well....I have since learned that using any key other than the one with the Buick symbol on it could be the problem so now I am only using that key. So far, I have not had either problem but its only been 24 hours. I'm gonna see if this "fixes: it but if not, any ideas?
You need to have the security system scanned when this problem is occurring, it could be a door ajar switch that is defective.
SOURCE: 1995 Buick LeSabre won't start when security light comes on.
When my 1994 LaSabre had a problem recognizing the chip in the key (due to the contacts in the lock not working), I managed to bypass the system by locating the two wires (clear tube with two smaller wires in it exiting the steerin column, unlike any other wiring), cutting the cable, and soldering a resistor across the two wires that go to the hidden module thet in turn controlls the starter and sends a signal to the engine computer. Use a resistor of the same resistamce value as in one of the keys for the car (measure resistors with a digital meter). There are a dozen or so values used. You loose the extra protection of the chip, but the fix is low cost.
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SOURCE: Interior lights won't turn off 1999 BuicK LeSabre.
yes there is a relay switch in engine compartment or under dash
SOURCE: 2004 Buick Lesabre speedometer not working
Yes it's on the right side othe transmission just above the passenger side cv axle. You most likley need to send the cluster off and have it checked. Model Electronics in NY.
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So I recently read somewhere that I should make sure I am using a key that has the Buick logo on iot. When I bought the car I was given sevearl keys but only 2 have the lgos. Anyway, long story short, for about a week now I have been using the suggested key and guess what: No security light comes on and no problems at all with the instrument panel! So I think its safe to say I have "fixed" this problem. If anything changes I'll be sure to update it.
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