I have a 1995 Olds Cutlass Supreme that uses the Pass-Key II security
system. Just last night, the "Security" light on the dash failed to turn
off after starting the vehicle. The car still runs fine in spite of the
security light being on. I tried a second key and the vehicle started with
no problem but the light also stayed on with the second key also. The car
will start and run again and again with either of these two keys and stay
running. Both of these keys have the little resistor chip in them. Has
anyone had similar problems? What was the fix? Thank you in advance for
any help provided.
When the "Security" light stays on permanently after being started, it means
the security system isn't functioning properly. You need to get the car
scanned to find out what codes the computer is storing. That will lead you
to the problem.
Most probably is broken wires from the ignition cylinder, the ones
that read the resistor in the key. At the base of the column under the
removeable panel will either be a two wire connector with two very
small white wires most often
in an orange sleeve, or the two wires go into a large rectangular
connector(should still have the orange sleeve). If you are multimeter
savvy, you can measure the resistance across the two wires while
inserting and rotating the ign. cylinder to all positions. It should
match the resistance of the key pellet very closely in all ranges. If
out of the range or open, then the cylinder will need replacement and
you will need new keys.
What would happen if you were to put a resistor of the same value as the key
has in it across the two wires coming from the ignition switch? Would this
bypass the security completely, if you didn't wish to have it anymore?
I don't think that the permanently wired resistor will do the trick. My
limited understanding is that the computer looks for a transition from an
open circuit to the correct resistance value as the key is inserted and
For what it's worth my Uncle has a 1997 or 1998 and he has been
driving it that way for years. A garage mechanic advised him that as
long as it starts okay and it doesn't bother him to just leave it as
is; since money is an issue.
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