2002 Buick Lesabre No power and won't start

Tiny
CBTENNESSEE
  • MEMBER
  • 2002 BUICK LESABRE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 236,000 MILES
When I turn the key on I get the lights on the dash but it won't start. My doors won't unlock no power to mirrrors, trunk won't open. But my powers seats will move. Any ideas
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Tuesday, June 16th, 2009 AT 9:12 AM

8 Replies

Tiny
JDL
  • EXPERT
Hello, are you saying, it cranks good but won't start?
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Tuesday, June 16th, 2009 AT 9:43 AM
Tiny
CBTENNESSEE
  • MEMBER
No it won't crank or start.
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Tuesday, June 16th, 2009 AT 1:52 PM
Tiny
JDL
  • EXPERT
Do some testing at the crank relay, under the hood. Your owners manual should give you the location. Unplug the relay, turn the key to on, use a testlight, check for voltage at two of the terminals. Let us know what you find.
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Tuesday, June 16th, 2009 AT 2:07 PM
Tiny
CBTENNESSEE
  • MEMBER
OK I tested that and I have voltage at the relay when I turn the switch on.
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Tuesday, June 16th, 2009 AT 7:47 PM
Tiny
CBTENNESSEE
  • MEMBER
My security light also flashes and security comes up in the instrument message center. And my wipers, pwr windows, pwr locks won't work.
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Wednesday, June 17th, 2009 AT 6:25 AM
Tiny
JDL
  • EXPERT
Wait till the security lite stops flashing, then try to start. It may take 10 minutes or so before it will stop flashing.

If two terminals at the relay were hot, then the computer may not be grounding the relay. The computer gets a crank sense signal from the ignition switch, tells the computer to ground the relay.
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Wednesday, June 17th, 2009 AT 10:47 AM
Tiny
CBTENNESSEE
  • MEMBER
Tried that and it sat for 20+ minutes and security message stayed on and the light flashed the whole time
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Thursday, June 18th, 2009 AT 8:39 PM
Tiny
JDL
  • EXPERT


http://www.2carpros.com/forum/automotive_pictures/170934_buick_lesabre_1_1.jpg




http://www.2carpros.com/forum/automotive_pictures/170934_buick_lesabre11_1.jpg



As far as a relearn procedure, the above is all I have.
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Friday, June 19th, 2009 AT 11:28 AM

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