Car will not start

Tiny
SREVE
  • MEMBER
  • 1999 CADILLAC DEVILLE
  • 4.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 136,000 MILES
Car won't start theft system problem light is on and fuel pump relay clicks constantly when key is on.
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Saturday, February 27th, 2016 AT 2:13 PM

10 Replies

Tiny
KEN
  • ADMIN
The car will do that if the battery is low can you check it, here is a guide.

https://www.2carpros.com/articles/how-to-check-a-car-battery

please let us know what you find so it will help others
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Thursday, March 3rd, 2016 AT 9:19 AM
Tiny
SREVE
  • MEMBER
I bought a new battery and still the same problem. Left key on to reset computer but still won't start. Will turn over but not start. Fuel pump relay still clicking constantly.
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Monday, March 7th, 2016 AT 12:38 PM
Tiny
KEN
  • ADMIN
It sounds like the fuel pump relay or the fuel pump has shorted, try the relay first here is a video on how to replace it.

https://www.youtube.com/watch?v=S6ka-fscAuw

Please get back to me

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Monday, March 7th, 2016 AT 5:02 PM
Tiny
SREVE
  • MEMBER
I tested the relay and it's ok. I checked the voltage going to relay and it is sporadic. I think the car won't start has something to do with the theft system problem. The theft system problem light is still lit up on dash.
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Tuesday, March 8th, 2016 AT 3:38 AM
Tiny
KEN
  • ADMIN
Okay, open the open and close all doors, disconnect the battery for two minutes and reconnect, Then lock and unlock the drivers door and then try to start the car, please let me know what happens
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Tuesday, March 8th, 2016 AT 7:56 AM
Tiny
SREVE
  • MEMBER
Ok, I'll try that tomorrow. Will let you know tomorrow night. Thanks for your input.
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Tuesday, March 8th, 2016 AT 7:44 PM
Tiny
SREVE
  • MEMBER
I tried opening and closing doors, disconnected battery for 2 minutes, reconnect, lock and unlock drivers door, and still no change.
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Friday, March 11th, 2016 AT 12:06 PM
Tiny
KEN
  • ADMIN
Those cars have little wires coming out of the ignition switch which lead to the security system, its sounds like one of them is broken, you will need to remove the ignition tumbler to see if this is the problem.
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Friday, March 11th, 2016 AT 12:53 PM
Tiny
SREVE
  • MEMBER
I did read that somewhere. Can I bypass that with some resistors?
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Friday, March 11th, 2016 AT 1:03 PM
Tiny
KEN
  • ADMIN
I don't think so the security system must be enabled and that's the only way I know of though I have heard of people bypassing it somehow, if you learn how please let me know
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Friday, March 11th, 2016 AT 3:38 PM

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