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1992 Cadillac Deville Wont Start

Tiny
NICOLECRANKER
  • MEMBER
  • 1992 CADILLAC DEVILLE
  • V8
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
I have a 1992 Cadillac Deville. I did a tune up(plugs, wires, cap and rotor) as well as the BCM because all dash lights were out. Car ran great and drove well, dash works. Turned car back on to warm it up and went back inside, when I came out the car was dead. It now will not start. I replaced the Alternator and the battery is reading around 12V. The security light on the left of the dash is blinking. The car has good fuel as well. Any ideas?
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Tuesday, January 25th, 2011 AT 5:01 PM

13 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If the security light is blinking then that is probably why it's not starting. Here are the instructions to reset teh security system.
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Tuesday, January 25th, 2011 AT 8:53 PM
Tiny
NICOLECRANKER
  • MEMBER
  • 8 POSTS
Hmac300 so essentially I'm going to leave the ignition in the on position for about 10 minutes. When the security light stops blinking attempt to start? Am I interpreting this correctly? Thank you ahead of time!
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Tuesday, January 25th, 2011 AT 11:01 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Yes leave the key on until it quits blinking. Follow the instructions and it should be ok.
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Tuesday, January 25th, 2011 AT 11:03 PM
Tiny
NICOLECRANKER
  • MEMBER
  • 8 POSTS
I turned the ignition on so the dash lights are all on including the battery "charge" light. The security light is NOT blinking it is only blinking with the ignition off and in the on position before the dash lights turn on. I left it for 20 minutes and the light did not turn off. I am currenty trying to charge the battery and it still will not turn over? Any further advise? Please? Thank you
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Wednesday, January 26th, 2011 AT 2:36 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Clean yoru battery cables, charge the battery and have the battery checked to see if it's any good. Most auto parts stores can do this. Yoyu may have a bad battery.
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Wednesday, January 26th, 2011 AT 3:02 PM
Tiny
NICOLECRANKER
  • MEMBER
  • 8 POSTS
Even with 12.5v it could still be the battery?
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Wednesday, January 26th, 2011 AT 3:53 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Yes you have to have a load test put on the battery
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Wednesday, January 26th, 2011 AT 9:44 PM
Tiny
NICOLECRANKER
  • MEMBER
  • 8 POSTS
If you are looking straight on at the car on the left side of the throttle body to the right of the rear alternator bolt there seems to be some sort of sensor. It seems to have a plastic line that runs next to the throttle body. Do you know what this might be. I can't seem to find anything on it!
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Saturday, January 29th, 2011 AT 1:02 AM
Tiny
NICOLECRANKER
  • MEMBER
  • 8 POSTS
And just put in the new battery. Still no start
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Saturday, January 29th, 2011 AT 1:53 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If it doesn't turn over(engine) take a hammer and hit the starter on the side, no tthe solenoid. If it turns over and starts then, you'll need a new starter. Or see if you can get a jump and get it to turn over and take a draw test on the starter. Also check your fuel pressure. The sensor may be your manifold air temp sensor. You shold have 8-11 psi if it's tbi.
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Saturday, January 29th, 2011 AT 2:06 AM
Tiny
NICOLECRANKER
  • MEMBER
  • 8 POSTS
I checked for spark today. I have a spark tester that I mounted to the block, NO SPARK! I put a test light at the cap, no light, when cranking. I read that to test the coil that is mounted at the top of the cap, you need to disconnect the battery and test the Ohms, which should read about 1500 when you place leads on both wire ends. Can you verify this is the correct procedure? If so, when tested I got.5 ohms. Any advise so I dont have to blow this car up :)

Oh and also I noticed there seems to be some sort of a pump or compressor to the right of the block that will go off and run for about a minute with the keys off. Any ideas if that might be something?

Thank you for all of your help.
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Saturday, January 29th, 2011 AT 10:51 PM
Tiny
NICOLECRANKER
  • MEMBER
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Oh and of course, one other thing, If the door latch gets pushed down and the door gets shut, and the latch is jammed in there is there any other way to get that latch back out than attempted the hammer and a screwdriver while pulling the latch technique? Or do I just have to replace the latch?

Thanks again.
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Saturday, January 29th, 2011 AT 10:53 PM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Lube the latch if that doesn't work replace it. Go to the DIY on the site here and it iwlltell you how to check your iginiiton system under tune up. If that dos't work then take it to a pro.
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Saturday, January 29th, 2011 AT 11:41 PM

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