Question about 1994 Cadillac DeVille

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Security system for automobile

Thank you for helping me troubleshoot my problem with the security with a 94 cadillac deville (security light comes on and i can not start the car. i have to wait almost 9 minutes). here is another question i would like anwsered. can i have the security system disabled,having the wired clipped instead of having to spend $400.00 to have the security system fixed? the security system is not an aftermarket brand. thanks

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  • msteagarden Oct 06, 2009

    So, is this resistor something i have to take to a mechanic? Or can I do it myself? And thank you for the info..

  • msteagarden Oct 06, 2009

    okay, i called a auto alarm system and they said i should take it to the dealership to have it repaired.
    thanks

  • msteagarden Oct 06, 2009

    Can you draw stick figures for me because you are talking another lanuage to me. I will pass this onto my friend who may be able to understand this. Thank you...

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  • Cadillac Master
  • 75,235 Answers

U can't just clip the wire however you can install a resistor that equals the value of the key into the anti-theft module to bypass it.

Posted on Oct 05, 2009

Testimonial: " I think I should take it to a mechanic and be done with it.....I forget you need a tech and mechanic to work on new autos...great site.Thanks!!!!!!!!"

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  • yadayada
    yadayada Oct 06, 2009

    call a local alarm installation shop, many have the knowledge to do this bypass of the factory system, yes it takes a good working knowledge of the electronic controls of the car.

  • yadayada
    yadayada Oct 06, 2009

    Here is the full procedure of how to do this bypass.



    Alright, let's begin the madness:
    1. Take your DMM, set it to measure Ohms (use the 20k setting.) Measure the resistance across the pellet of the ignition key. Place one probe on the silver part of one side of the pellet, and the other probe on the other side. Write this value down.
    2. Purchase a resistor or resistors that add up to the value measured in step 1. Radio Shack is a great place to go for the resistors, heat shrink tubing, and the "bullet-style" solderless connectors.
    3. Take the 16 ga. wire and cut into 2 four-inch pieces.
    4. Strip off approx 1/16" of insulation off each side of both wire pieces.
    5. Put your resistors together in series (or if you're lucky and have a chip that has a resistance that matches a single resistor) and solder one wire to one end of the resistor(s) and the other wire to the other side.
    Example: You measure 11.72 on the 20k (k meaning kilo or 1,000) scale. The closest match is 11.801 which is a #15 "chip." Always remember that resistors have a tolerance of 2%, meaning the resistance value of the "pellet" can be either 2% higher or 2% lower than 11.801 k ohms (11.72 falls in tolerance range.) You will want to aim for 11,801 ohms. So when you go to Radio Shack you want to pick up a 10,000 ohm (10k,) a 1,000 ohm (1k,) and an 800 ohm resistors to wire together in series to achieve the 11.801k ohm value.
    Here's an example of how you'd connect the above mentioned resistors in "series"
    wire------10k ohm------I------1k ohm------I------800 ohm------wire
    6. Measure the resistance across the 2 wires now that the resistors are soldered to them. Be absolutely sure the value matches that of the resistor pellet in the ignition key (within 2% up or down.)
    7. Cut a length of heat-shrink tubing to cover up the resistors, allowing a small bit to hang over onto each of the 2 wires. Use a lighter or heat gun to shrink the tubing.
    8. On one of the wires, crimp on a male bullet connector, and on the other wire crimp on a female bullet connector.
    9. Now what you have should look like this:
    Notice in the above "resistor pack" I lucked out and only needed 1 resistor to match the pellet's resistance. You may not be so lucky...
    10. Now move to the car. Remove the under-dash kick panel.
    11. Look for an orange wire running down the steering column. This wire should have a "rubbery" feel to it, and it is the only orange wire running from the column.
    **WARNING** Do not tamper with any of the wires near the column wrapped in yellow harness tape or any yellow wire. These wires are for the airbag. Tampering with any of these wires could result in the airbag discharging.
    12. Cut this wire (there are 2 small wires inside) and strip back the insulation on the wires on the opposite side of the steering column.
    13. Install a male bullet connector to one of the 2 wires, and a female on the other.
    14. Plug in your "resistor pack" that you made by mating the male and female bullet connectors.
    15. Attempt to start the car. If your problem was with the VATS reader in the ignition lock cylinder, this will start the car.
    If this won't start the car, then the problem is in the VATS module. If the VATS module is bad, remove the resistor pack. Strip the insulation off the other side of the main wire cut (running from the column) and place a male connector on one wire and a female on the other. Plug the 2 halves back together to restore the function of the VATS reader.
    Alright, let's begin the madness:
    1. Take your DMM, set it to measure Ohms (use the 20k setting.) Measure the resistance across the pellet of the ignition key. Place one probe on the silver part of one side of the pellet, and the other probe on the other side. Write this value down.
    2. Purchase a resistor or resistors that add up to the value measured in step 1. Radio Shack is a great place to go for the resistors, heat shrink tubing, and the "bullet-style" solderless connectors.
    3. Take the 16 ga. wire and cut into 2 four-inch pieces.
    4. Strip off approx 1/16" of insulation off each side of both wire pieces.
    5. Put your resistors together in series (or if you're lucky and have a chip that has a resistance that matches a single resistor) and solder one wire to one end of the resistor(s) and the other wire to the other side.
    Example: You measure 11.72 on the 20k (k meaning kilo or 1,000) scale. The closest match is 11.801 which is a #15 "chip." Always remember that resistors have a tolerance of 2%, meaning the resistance value of the "pellet" can be either 2% higher or 2% lower than 11.801 k ohms (11.72 falls in tolerance range.) You will want to aim for 11,801 ohms. So when you go to Radio Shack you want to pick up a 10,000 ohm (10k,) a 1,000 ohm (1k,) and an 800 ohm resistors to wire together in series to achieve the 11.801k ohm value.
    Here's an example of how you'd connect the above mentioned resistors in "series"
    wire------10k ohm------I------1k ohm------I------800 ohm------wire
    6. Measure the resistance across the 2 wires now that the resistors are soldered to them. Be absolutely sure the value matches that of the resistor pellet in the ignition key (within 2% up or down.)
    7. Cut a length of heat-shrink tubing to cover up the resistors, allowing a small bit to hang over onto each of the 2 wires. Use a lighter or heat gun to shrink the tubing.
    8. On one of the wires, crimp on a male bullet connector, and on the other wire crimp on a female bullet connector.
    9. Now what you have should look like this:
    Notice in the above "resistor pack" I lucked out and only needed 1 resistor to match the pellet's resistance. You may not be so lucky...
    10. Now move to the car. Remove the under-dash kick panel.
    11. Look for an orange wire running down the steering column. This wire should have a "rubbery" feel to it, and it is the only orange wire running from the column.
    **WARNING** Do not tamper with any of the wires near the column wrapped in yellow harness tape or any yellow wire. These wires are for the airbag. Tampering with any of these wires could result in the airbag discharging.
    12. Cut this wire (there are 2 small wires inside) and strip back the insulation on the wires on the opposite side of the steering column.
    13. Install a male bullet connector to one of the 2 wires, and a female on the other.
    14. Plug in your "resistor pack" that you made by mating the male and female bullet connectors.
    15. Attempt to start the car. If your problem was with the VATS reader in the ignition lock cylinder, this will start the car.
    If this won't start the car, then the problem is in the VATS module. If the VATS module is bad, remove the resistor pack. Strip the insulation off the other side of the main wire cut (running from the column) and place a male connector on one wire and a female on the other. Plug the 2 halves back together to restore the function of the VATS reader

  • yadayada
    yadayada Oct 06, 2009

    I have given allot of my own time here at no charge, even if you don't understand the instructions could you please rate my help with a FIXYA as a way of saying thanks?

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