Question about 1991 Oldsmobile Ninety Eight Regency

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91 olds ignition switch

I have replaced the ign. switch once and the pass key wire has broke again. Can I bypass the passkey.

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  • paltiaro May 11, 2010

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1 Answer

My 94 buick gs shutoff an now it want turnover an start with key switch but crossout starter it starts but dies rightafter


Sounds like VATS (vehicle anti theft system). There is probably an open wire from ignition switch that reads the resistor in the ign. key. Either replace ignition switch lock or bypass the vats reader with resistance of the same value as key. There should be a thin wire running out bottom of column and plugged in near bottom of column it usually has 2 yellow wires. You can place the resistance across the two plug in contacts to by pass .

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Actually meant the security module on a 94 cutlass supreme, cheapest way to bypass


It depends on which anti-theft system yours has . VATS , PASSKEY 1,2etc... your vehicle is not new enough to have PASSKEY 3 . There are videos on you tube on how to by pass it . You need to find out what resistance yours has , go to radio shack or some other electronic store an by that size resistor . Then you need to find the right wires under the dash coming from the steering column ,if your ignition switch is in the column .Then solder the resistor to the two wires . Does you ignition key have the pellet on the side ? The two wires your looking for are white inside a yellow or orange sheath , plastic shield .

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Ignition fuse location


The ecm fuse also powers the pass-key module on the key barrel.
See diagrams below. I recommend you probe the starter enable relay socket to see if it is getting the ground signal from the pass-key decoder whole someone tries to start the car.


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1 Answer

Need to bypass passkey moduler


ohm your ignition key resistens and buy a resistor and place in connector under dash where steering column is, will have connector with to small wires, insert proper resistor in connector on eiring side not key lock side and that will by-pass pass key system

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2 Answers

91 cadillac seville wont turn on state that its in theft mode microchip in key may be the problem need help what to do?????


The problem is the ign. lock cylinder NOT the key. The tiny wires have broken and you need to get the ign . lock cylinder replaced and a new chip key to fit it.

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1 Answer

Having problems with 99 regal passkey lock. its getting worse fast. it had a new ignition key tumbler 2 years ago but i dont know if they changed the passkey wire can i bypass it?


yes you can,fist locate the wire that goes to the key resistance,you are going to bypass it whit the resistence of a ignition wire,cut the wire in difrent lengts less than a foot,this makes difrent resistence values,put them to the wire on the car to find the one that will ignite the car.

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The easiest thing to do is lock the doors MANUALLY, which will NOT allow the secuity system to arm, Now if your talking about the PASSKEY ANTI THEFT, well bypassing that system is another invlved issue. Hope this helps

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