Question about 2002 Cadillac Deville

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I've changed all the fuses, relays,and the starter on my 2002 Deville dhs and it still won't start.

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  • 13,021 Answers

It won't crank over ? Is there a SECURITY light lit on the instrument cluster .
In the under hood fuse / relay box is the start 1 relay , this relay is energized by the PCM - powertrain control module ! This is the relay that controls the starter ! If there is a anti-theft system problem the PCM will not energize the start 1 relay completing the circuit turning on the starter ! . If you knew how you could test right from the start 1 relay socket in the fuse box , rather that just replacing parts ! You can test with a DVOM -digital volt ohm meter or a test light ! Two of the four sockets have battery voltage , one should show ground an the last will show open , this is the control circuit from the PCM .

Chevy Trailblazer no crank testing and information

Posted on Apr 14, 2015


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Posted on Jan 02, 2017

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SOURCE: i can't locate the starter relay for cadillac

The starter relay is on the drivers side of the engine compartment behind the air filter housing under the fuse box cover

Posted on Jul 08, 2009

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SOURCE: 2002 GMC Envoy, i put the key in ignition and

Ignition switch and neutral safety switch. Next time it happens wiggle thekeys in the ignition switch and try to restart.If it starts its probably the ignition switch. Then locate neutral safety switch on brake pedal and put meter on B+ wire from switch to starter relay and see if you get B+ on the would -be- crank. Next locate B+ wire from starter relay to starter hook a meter to it and see if you get B+ on the would -be crank.
Where ever B+ is missing is your problem.

Posted on Apr 14, 2010

  • 2620 Answers

SOURCE: 2002 pontiac bonneville interior lights

Look for a short in that circuit.Their is a hot wire grounding out

Posted on May 15, 2011

  • 14585 Answers

SOURCE: 1997 deville, battery drains overnight,pin

I've replaced several rear body control modules that go bad and drain the battery. It is located behind the seat, black box about 4" x 5" rectangle. You can use a hand held scanner to diagnose them, the ones I replaced did throw a code. It is complicated and you need a pinout chart to diagnose it with an ohm meter. The ones I got were new and ran around $350.00

Posted on Jun 09, 2011

  • 6 Answers

SOURCE: 1999 Ford explorer, starting system,Batterey new, starter ok,relay,selinode, won't start, could it be ignition module?

Does it turn over?

Posted on May 16, 2012

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I have a 2002 Mercury Sable w/DOHC that was drove through flooded intersection last week & stalled. The water was about 2-3 feet deep. I've replaced oil, filters, spark plugs & dried out...

when car won`t turn but clicks then the ( brushes of you starter are worn may be the man who replace used the old brushes ) its very simple thing but will get your car to start
but you didn`t mention anything about fuses and relays if you haven`t replace them all then replace relays/fuse first
you welcome any time sir .

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