Question about 1991 Oldsmobile Ninety Eight Regency

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The ignition lights does not come when ever I turn the key. Checked all fuses and breakers, and the are all good. Replaced computer and ignition switch. The key has a chip on it, could this be the problem?

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  • Anonymous Oct 19, 2009

    How do I bypass the chip on the key?



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Could the ignition light bulb itself be blown?

Posted on Oct 19, 2009


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Check current drain with car off. Start removing fuses until one makes the drain go to zero. then diagnose that circuit. It could be something silly like a glove box light.

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Maybe the switch has a malfunction. I guess you would need to check for power in to the switch, then check for power out with key ON. Have a voltmeter or test light? The key should turn the ignition system on, so look for power at the ignition coil with key on. Assuming it is gas, not diesel. JD110-is that a small tractor?

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92 Toyota pickup, was blowing efi fuse now its not but when I turn the key it doesn't do anything

A bad short blowing the fuse. Could be in the wiring for that circuit, or bad part, component (like the computer, sometimes a shorted injector).
Check if the fuse still has power to it. Use a test light to check for power at the fuse. If no power, probably blew a fusible link or maxi fuse that is the feed for that fuse block.
Turn key to on-do the warning lights and dash gauges come on? If not, check that power is still getting to the ignition switch. I think there are fuses (AM1 &2?) for the ignition switch, not fusible links.
Shorts in the wiring can be difficult to find, may be buried deep in a wiring harness, one needs to check continuity of wiring to locate wiring shorts, looking for high resistance in a section of wire-you may need a shop to diagnose. If you have a wiring diagram available, could start checking wiring and parts in that circuit.
If you want to get creative, here is how an auto electrician can hunt for shorts: use some jumper wires and hook up a circuit breaker of same rating as the efi fuse in that fuse slot. Now when testing you will not be constantly blowing the fuse-circuit breaker will reset every time. Unhook parts in the circuit one at a time, turn key on so power is going through the circuit, whatever part is unplugged that breaker does not trip, that is the problem-the wiring to it or the part itself. Also do a wiggle test of the wiring: key on, move different parts of the wiring and harness, if you cause the short tripping the breaker (or blowing the fuse if you just keep adding a new fuse each time) then you have found the short.
Here's a heads up: anytime you want to pull the connectors off of the computer, make sure key is off, remove negative battery terminal, pull connectors off the computer, reattach the negative battery terminal. With connectors off examine connector pins for any corrosion or bent pins.
Good luck, get power back to the ignition switch if it is lost, then start looking for what is blowing the efi fuse.

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You may have a security system problem (Most likely caused by an ignition lock cylinder fault)

Is your SECURITY light flashing?

If so, do this:

Turn the ignition switch to the START position then release the key, leaving it in the RUN position.
Wait approximately 10 minutes untill the security light stops flashing, then without turning the key off, turn it to the START position again. It should start. If it does, then you should probably replace your ignition lock cylinder. The problem will gradually get worse until this method no longer works.

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