hello i am new to the board and wanted to know on bypassing the security or vats on my 95 firebird. sometimes my car won't turn over and security light comes on. maybe wait 5 or ten minutes it will fire right up.
they say you can buy a resistors from radio shack and match it to the key resistor and tap it into the orange wire to bypass the vats. another is a bypass module and wire it in. does this sound right?.will the resistor trick work?. i hopeing for a bad or dirty resistor on the key.is the bypass module easy to hook up.

 

http://shbox.com/1/pass_key.html

 

shoebox

in the 95 firebird that i have is it the orange wire from the key cylinder that has the two white wires in it that i suppose to cut and solder in resistor or resistors to bypass if needed?. i will check wire to cylinder with volt meter and read it that matches the key . what happens that is that i started the car and ran for few seconds and shut off. secuity light came on. waited few minutes and tried it again and started. hasn't done it again for a while. i hope its the key. will buy a vat key off of ebay and try it. is this the only thing i need to bypass the vats is resistors to match the key and will this still allow the car to start.

 

i had a similar problem in my 95 formula. usually after the car sat for 1-2 hours, it wouldnt crank at all, wait a few more hours and it would start right up. turned out the ignition switch itself was burnt out. wasted a few hours trying to diagnose the vats system for a simple 1/2 hour fix... just another point of view for ya.

 

Sounds about right. Be sure to look at all the links in the info link I posted above. It should answer all questions.

 

Good stuff in those links by shbox.

Question (and yes, the original post is older than dirt, I know!):

(1)"When cleaning the key, key cylinder or changing keys does not help, a key cylinder problem is likely. Either the contacts in the cylinder get worn out or the wiring in the column fails. The cylinder comes with leads attached, if replacement is necessary (some disassembly of the top of the steering column is required). Some choose to bypass the cylinder by using a resistor (aftermarket alarms often also require bypassing the key lock cylinder).

(2)Replacing the TDR is just plug and play, but some will bypass it also. Referring to this schematic (1995), you can unplug the relay and join the yellow and purple wires together. This completely bypasses the relay.

(3)You can also keep the relay (if it is working), but bypass the need for the TDM to operate it. Referring to the schematic, the yellow/black wire from the TDM to the TDR would need to be permanently grounded toward the TDR. Doing this only, will not affect the neutral safety or clutch switch operation. The relay will only operate when the switch is in the START position as that is the only time it would get 12v power.


If you bypass the relay via the 2nd paragraph vs. bypassing with a resistor, is the effect the same? I'm installing a remote start/etc. soon and if I don't have to bother with the resistors... It's seems like just bypassing the lock cylinder with resistors might be the way to go, perhaps I don't understand the latter part of the quote.

Also, anyone know best place/price to buy a bypass module should I need or choose to go that route?

Thanks!

 

Maybe you need to re-read how the system works to figure out just what you want to do. Bypassing the TDR only bypasses the TDR. It does nothing for the fuel enable signal the PCM needs. It all depends on what currently works or does not work.

If you have a working system and are only doing a remote start, then the resistor bypass is what you want to do.

 

Okay, having a similar problem been told told it could be the vats, if anyone could help we have a 94 trans am, bought as a project, they had taken the motor and wiring harness out of a camero, it was running fine in it. The car will not even crank over, Security light never comes on. Can cross the starter over it will crank, can put power to the fuel pump and it works, what could be wrong? All lights works, turn the key over and nothing, all fuses and relays are good.

 

Does the SECURITY light at least turn on for a few seconds (with the other dash warning lights) when you first turn the key to “run”?

 

Asked a question, immediately signed off, and never came back/signed in to look at the response. Should have suspected an issue with someone who spells it "camero"...... LOL.