vats ignition bypass, 91 camaro

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=106255
Printed Date: May 16, 2025 at 6:49 PM

Topic: vats ignition bypass, 91 camaro

Posted By: johwil04
Subject: vats ignition bypass, 91 camaro
Date Posted: July 20, 2008 at 1:35 PM

My son has lost the keys to my 91 Camaro RS. The keys had a resistor chip in them. I have replaced the ingition cylinder which came with new keys. Now i need to bypass the vats by using an in-line resistor. I am not an electrician and i am not sure how to use the ohm meter, or where to read the resistance on the 2 white wires encased in the orange insulation. Can someone talk me through the resistance check part of this fiasco?

Thanks,

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Johwil04

Replies:

Posted By: i am an idiot
Date Posted: July 20, 2008 at 1:54 PM

You could have got a new key cut for the car from any larger GM dealership. You will still need to contact them to find out what value the resistor was in the original key. You will need the VIN number and the title or registration papers. Once you find out the value, simply insert a resistor of that value across the 2 wires that go to the vehicle.

The only reason you would need an ohm meter would be to measure the resistance of the chip in the original key.

Posted By: johwil04
Date Posted: July 20, 2008 at 2:02 PM

I tried the GM dealer and they gave me a big run around and told me that it would cost me about $250.00 to figure out the resistance and make me a new key. I was told by a very reliable source that it would be cheaper to replace the cylinder and by-pass the vats. Do i check the resistance across the two wires? do i put the resistor in-line on one of the wires or across the 2?

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Johwil04

Posted By: i am an idiot
Date Posted: July 20, 2008 at 2:08 PM

I think that there are only 10 different resistor values that it could be. I am sure somebody here can let us know what those values are. You would simply connect one end of the resistor to one of the wires, and connect the other end of the resistor to the other wire.

Posted By: i am an idiot
Date Posted: July 20, 2008 at 2:09 PM

https://home.grandecom.net/~desert_bunny/temp/gmdata/Vats%20Values.htm

Posted By: johwil04
Date Posted: July 20, 2008 at 3:23 PM

Thanks, I will give these resistors a try. I will let you know how it works out.

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Johwil04