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1972 Oldsmobile 98 - Page 3 Questions & Answers
In cold weather my 1989 Oldsmobile 98 won't start
Ours did that and in real cold weather could not boost it. Replaced the spark plugs and plug wires and no trouble since. Depends when the plugs were replaced before. If you replace the wires take one off at a time and replace it with a new one. Some people take them all off at once then they are in trouble.
I have a 1995 Oldsmobile 98 that wont start, lights work but won't turn over, but lights don't dim when I turn the key
The security, antitheft or lock picture/icon is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. This is why the security light turns on and shuts down your vehicle. This link explains it pretty well.
http://www.diy-gm-security.com/
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