I have a 1990 cadillac coup deville eldorado. I have owned it for several years but all of the sudden the security system will go off randomly. I have to manually unlock the doors and leave it unlocked. Sometimes it works and other times it does not. When it doesn't work, the battery is drained by morning. Can I disable the security system? If so how?

Asked by Dec 29, 2016 at 03:50 PM about the 1990 Cadillac Eldorado Biarritz Coupe FWD

Question type: Maintenance & Repair

I have a 1990 cadillac coup deville eldorado.  I have owned it for several years
but all of the sudden the security system will go off randomly.  I have to
manually unlock the doors and leave it unlocked.  Sometimes it works and
other times it does not.  When it doesn't work, the battery is drained by
morning.  Can I disable the security system? If so how?

3 Answers

80,225

You either have a Coupe deVille or an Eldorado. They're two different models. Anyhow, you also have the VATS (Vehicle Anti-Theft System). The most common trouble with these systems is the ignition lock cylinder. If you manually lock the doors the security system will not set. There's no way to disable or bypass the security system. HTH. -Jim

So how do you fix it then just asking because i have the same problem

You would need to replace the Lock Cylinder assembly. It has the " Key Reader" built into it. Or you can Ohm Out the key and put a resistor of the same value at the plug into the pcm wiring harness.

Your Answer:

Eldorado

Looking for a Used Eldorado in your area?

CarGurus has 5 nationwide Eldorado listings and the tools to find you a great deal.

Postal Code:

Cadillac Eldorado Experts

  • #1
    spiderblu
    Reputation
    820
  • #2
    tennisshoes
    Reputation
    370
  • #3
    Js08016
    Reputation
    360
View All

Related Models For Sale

Used Cadillac DeVille
15 listings
Used Cadillac Seville
3 listings starting at $1,797
Used Chevrolet Corvette
14 Great Deals out of 532 listings starting at $11,700
Used Chevrolet Camaro
6 Great Deals out of 1,003 listings starting at $4,500
Used Ford Mustang
22 Great Deals out of 1,220 listings starting at $5,995
Used Lincoln Town Car
10 listings starting at $6,990
Used Lincoln Continental
4 Great Deals out of 48 listings starting at $1,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.