Question about 1990 Cadillac SeVille

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My 1990 cadillac sedan deville has an ignition problem. Sometimes when I go to start it nothing happens. Turn key nothing, no click no nothing. Let it sit awhile and try again and it will start. Most of the time it will start first try. Put in a new starter problem still there. Ignition key has a security chip which I had checked and it was ok. stumped!!

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I would suspect the ignition switch is failing and needs replacing.

Posted on Sep 20, 2009

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I got a 1994 cadillac sedan deville ,,4.9 engine ,,came out of store and car wont start ,,turn key and nothing message says wait 3 mins,,still nothing,, what should i do,,can i replace ignition cylinder my...


You can bypass the antitheft system, this will be easier and ALOT more permanent. After bypassing, this will never happen again and you dont need to worry about the airbag. PS. Airbag wires are bright yellow on GM.

This page will help you alot. Comment back if you have any questions.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

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1990 sedan deville won't start. battery is good.getting power to everything but nothing to the starter.


Hello! There are several components that can cause no power to the starter...Lets eliminate...#1...Do you hear a "click" when you turn the key? It is the Starter Enable Relay...Powered by fuse #17 (15A)...The relay is enabled by the Pass Key Decoder Module...
Anti-Theft device...If no click is heard; The fuse is blown, the relay is bad, or the key you are using has a bad chip...#2...If you hear a "click"...The Park/Neutral switch is open/defective...#3...The power cable connection to the starter has a poor connection...

Guru..............Saailer

Oct 04, 2010 | 1990 Cadillac Deville

1 Answer

How to change a starter in a 1990 cadillac sedan deville?


First, I would determine it is bad. I have a 1990 Cadillac Sedan Deville, and sometimes it doesn't turn over. But, if I toggle the switch a few times or up to 5 times, it starts to turn over and the car starts.

I have the same problem with a 1997 Cadillac Deville.

If you are set on changing it, here is a picture and instructions on how to test:
prev.gif next.gif Starter TESTING Voltage Drop Test Fig. 1: Schematic of a voltage drop test 91052g10.jpg
NOTE: The battery must be in good condition and fully charged prior to performing this test.
  1. Disable the ignition system by unplugging the coil pack. Verify that the vehicle will not start.
  2. Connect a voltmeter between the positive terminal of the battery and the starter B+ circuit.
  3. Turn the ignition key to the START position and note the voltage on the meter.
  4. If voltage reads 0.5 volts or more, there is high resistance in the starter cables or the cable ground, repair as necessary. If the voltage reading is ok proceed to the next step.
  5. Connect a voltmeter between the positive terminal of the battery and the starter M circuit.
  6. Turn the ignition key to the START position and note the voltage on the meter.
  7. If voltage reads 0.5 volts or more, there is high resistance in the starter. Repair or replace the starter as necessary. NOTE: Many automotive parts stores have starter bench testers available for use by customers. A starter bench test is the most definitive way to determine the condition of your starter.
---
Remember to disconnect the battery and remove the wires from the starter at the hex nut.

Then, remove the 3 or so bolts that hold the starter on using an extension and ratchet if necessary.

Hope this helps.


Jul 05, 2010 | 1990 Cadillac Deville

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2001 Cadillac sedan deVille Frequently will not start on first try. Wait several minutes then starts. Sometimes starts after changing from Key fob 1 to key fob 2


I fought with this issue on my wife's car for almost a year, thinking, ignition, security, starter, changing fobs, etc. I finally caved and replaced the starter - that was it.

When this happens and you turn on the ignition, do the gauges come on,etc? This will help eliminate the ignition switch/circuits as a possible cause.

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Try cleaning the key "chip" resistor and if this doesn't work try the other key.

Dec 15, 2008 | 1994 Cadillac DeVille

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get new key with newer chip or replace ignition cylinder.

Sep 22, 2008 | 1991 Cadillac DeVille

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