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Security light blinks I dont have original key its a copy I want to bild a resistor pack dont have any way to know resistance there is like 30 different ones is there any otherchesp fix or anything

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  • Cars & Trucks Master
  • 3,679 Answers

What is your vehicle , make , model year etc , then might be able to help you

Posted on Apr 08, 2015


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Posted on Jan 02, 2017

  • 4669 Answers

SOURCE: security light

Bad contacts in the ignition lock cylinder.

Posted on Mar 28, 2009

  • 38 Answers

SOURCE: 1996 pontiac grand prix won't start-security problem

hold the reset button on the fuse panel and when it blinks let off of it and it will go away

Posted on Aug 02, 2009

  • 574 Answers

SOURCE: security light blinks on dash , truck wont even try to start

Does your key have a chip on it? If it does its probably the problem

Posted on Aug 23, 2009

  • 465 Answers

SOURCE: 1992 nissan maxima security light blinks.wont start fuel pres. ok

get your key recoded

Posted on Sep 11, 2009

  • 1165 Answers

SOURCE: i lost my original key

By trying to use another key yu triggered the antitheft system which prevents the car from starting. The only solution is to take it to a dealership and have them replace the ignition switch, the key and the module. About $1000.00. Or you can get a bypass system for about half that, maybe less. Check out this website before you do anything.

Posted on Jan 07, 2011

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Does anyone know how to rewire a 98 Toyota Avalon cause no one wants to help me bypass the security and I been without a vehicle going on a month

Probably because no one thinks it can be done. I don't think it can be done. You have to convince the engine computer it is getting the right signal from the anti-theft module before it will allow the car to start. The GM system runs off resistor chips in the key. You can "trick" the system to recognize any key if you wire in a "resistor pack" with the correct sized resistance matching the old correct key's resistance reading. See, you just wire in between the key lock cylinder, will be a wire going to the anti theft module (which then signals the computer all is okay to start the engine) -on a GM vehicle you wire in a resistor pack in the wire to the antitheft module. There are approximately 15-20 different resistance readings in those key chips. Maybe Toyota uses a similar- google it!

Nov 03, 2015 | Toyota Cars & Trucks

1 Answer

I have lost my chipped key but have an unchipped spare is there anyway to bypass the chip to use the key I have

Nope... You would have to know the resistance of the original chip and then tap a resistor of the same ohms into the security system to by-pass it

Jul 12, 2015 | Cars & Trucks

1 Answer

Cadillac Seville 1995

If your key has the resistor pellet with the short wire on each side, I can provide a bypass procedure. The vats wires are small and susceptible to damage. You will need to access the bcm connector. Basically, you need to measure the resistance of the pellet and make a resistor that has equal resistance out of a variety of resistors in series and parallel. I can do the math on that, if you tell me the resistance of the pellet. Then you cut the two vats wires at the bcm and solder the resistor to the back of the connector. I have done this on several cars.

Jul 28, 2017 | Chevrolet Equinox Cars & Trucks

1 Answer

My 1993 firebird was running fine after changing ignition switch and now it will not crank? told it was the vats key mod. need to know how to bypass it and where its located

Is there a pellet in the key. This type can be bypassed the pellet pushes to resistors outward to a given value from #1 to #14 if you can read key resistance then go to a electronics store a by a resistor that value now crawl under dash by gas pedal you will find a orange cord with two white wires in it place resistor across both wires and cut wires off leaving the ones going up steering column open. turn key on if security light is flashing wrong resistance value. try again. a haynes manual should have all resistance values but key code.

Nov 12, 2013 | 1993 Pontiac Firebird

1 Answer

1999 Buick Century Custom Security light blinks and car will not start

someone told me to by getting out of the car and locking the driver door with the key, going to the front passenger door and unlocking, then relocking the door using the key. I have to repeat this step 2-4 times and eventually it will start. ?????????
This has nothing to do with it starting !

This is what's happening , Inside the lock cylinder are contacts that read the resistance of the pellet on the key , the contacts are getting worn out . You have two options , replace the lock cylinder or by-pass it all together .
The PASS-Key II® ignition key (1) contains a unique resistor pellet which is idenified by the Body Control Module (BCM) (2). There are 15 different key (resistor) codes. Only one ignition key resistor pellet code will work with each PASS-Key II® theft deterrent system.
Ignition Key Lock Cylinder
The ignition lock cylinder contains spring loaded contacts which make physical contact with the ignition key when it is inserted into the ignition lock cylinder. This allows the ignition lock cylinder to provide the Body Control Module (BCM) (2) with the resistor code embedded in the ignition key.

GM VATS Key Resistor Key Security Bypass

Jun 29, 2017 | 1999 Buick Century

1 Answer

Security light is blinking won't sart

The ignition key has a small pellet in it which has a precise electrical resistance. There are about 30 different values. In order to start the car you need the correct ignition key to turn the lock and a pellet with the correct resistance. If the computer measures the resistance incorrectly, it disables the starter and shuts off the fuel injectors for 3 minutes. The message "clean your key" should appear on the computer screen. The problem can be caused by several factors.
What Im trying to say is you'll need to get the key reprogrammed if you've cleaned it and the car still does not start. This is a "security feature" to make sure that a duplicate key i.e. cut from yours will not work in your car as they have special resistor chips in them the car recognizes the value of.

Mar 20, 2011 | 1998 Oldsmobile 88

1 Answer

When I turn my ignition to the start positon the headlights and the dash lights come on but no crank the security light is blinking but not to sure if that is the issue I think it could be my starter,...

if the security light is blinking, it's the VATS system not recognizing the resister pill in the key. I currently have the same non start issue, but I bypassed the VATS ignition key but the car still doesn't start. My security light acts like it should. It comes on when the key is inserted and goes off after 5 seconds. If it blinks, it's not seeing the right value.

Google VATS system bypass. Resistors cost me about 3 bucks at radioshack.

Jan 07, 2011 | 2002 Chevrolet Camaro

1 Answer

When the security light keeps bli.nking,it will not start. I have had a computer and instrument panel circuit board installed,still nojoy!

this car has what we call a VAT's key security system. the most common problem with this system is that the resistor that is in the key looses it's resistance value and the security system no longer accepts it. as a locksmith I run into this very often and the fix is very simple but needs to be done by a locksmith or a mechanic that knows what they are doing.
the fix requires the teardown of the steering column and fitting ( hard wire ) of a resistor with the correct value directly to the ignition switch itself,, this basically bypasses the key security part of the system and from that point on you will be able to use just a regular ignition key ( flat key NONE VAT's key ) which will save you a lot of money in time when getting copies made, ( regular keys cost about $2.75 -- VAT's keys cost around $29.95 per key ).
seek out a local automotive locksmith or mechanic and tell him what you would like to have done and for about 85 dollars this fix can be done ( the cost of the resistor is about 5 dollars ).
this will solve your problem.


Jan 04, 2011 | 1998 Oldsmobile Achieva

1 Answer

I have a 1998 pontiac bonneville. the cars security light is on and the car wont start.

I have the same car, had the same problem. If you know a little about the car heres a cheap fix. The problem is the key reader (i don't know the name of it) take off the panel below the steering wheel, look for a pink wire coming out of steering column cut it in half (careful yellow is air bag). Then take an ohms reader($20.00 @radio shack) read the resistance on the security piece on the key (little black piece) buy a pack of resistors from radio shack ($6.00) and piece together the same resistance that is on the key. I think you get a 10 or 20% variable so it does not have to be perfect. Mine was 1.83k. inside the pink wire is two white wires split them and loop around the resistance wire you made. use the wire coming from the toward the engine, not the one going toward the key. The car should start.And that gives the system a proper read.

Sep 22, 2010 | 1998 Pontiac Bonneville

1 Answer

I hav the keys from the old car and the speedometer do i still have to take it to the dealer to get pass the security problm i replaced the chips in the keys but my stereo says locked the motor turns but...

It is possible IF you have the ORIGINAL keys to the car to read the resistance of the original key, use Radio Shack resistors and build an IN-LINE resistor to replace the key's requirement to have the chip. After you know the correct resistance for your car, purchase enough resistors to wire in-line to create the right resistance, then in the steering column you will find two micro-sized wires, usually yellow (DO NOT CUT the slightly heavier Air Bag yellow wires). Cut the two yellow micro-sized wires wire your homemade resistor in line between them, tape all of your wiring up good and try to start it... As far as the dash goes, yes you should still have to go to a dealer to reprogram the computer..., You might just consider takng it in anyhow and doing it right.

Feb 24, 2010 | 1999 Cadillac DeVille

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