Wont Crank no Power to starter

Tiny
MATTCHEVYGUY
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  • 1999 CADILLAC DEVILLE CONCOURS
  • 4.6L
  • V8
  • FWD
  • AUTOMATIC
  • 198,000 MILES
When I go to start the car the starter does nothing the fuse box clicks but nothing to the starter I tore the intake off and had the starter tested it its fine I replaced the starter relay checked all the grounds and tested all the starter wires on the starter relay plug I jumped from the red wire to the purple starter wire and nothing happened I ran a wire from the battery to that purple starter wire and the starter engaged I tested the 2 yellow wires with key on that I believe to be ignition and pcm and I had 9v on the small yellow and 12v on larger one I have tried about everything I know and I cant figure it out

any help would be appreciated thanks matt
Thursday, April 10th, 2014 AT 11:13 AM

14 Replies

Tiny
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Sounds more like its coming from between the ignition switch and starter relay-check for an open circuit-start here
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Thursday, April 10th, 2014 AT 12:43 PM
Tiny
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What should I check for?
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Thursday, April 10th, 2014 AT 3:17 PM
Tiny
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Below is your starter control circuit:
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Thursday, April 10th, 2014 AT 9:36 PM
Tiny
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I cannot view the image
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Friday, April 11th, 2014 AT 11:04 AM
Tiny
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In cranking position at the key-check for power on the red wire at the starter relay-you should have 12 volts if not check all your battery fuses-there's two of them
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Friday, April 11th, 2014 AT 1:00 PM
Tiny
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All fuses are good but I only have around 2.5 volts
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Friday, April 11th, 2014 AT 4:38 PM
Tiny
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Where do you have 2.5 volts at-You sure the battery is okay
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Friday, April 11th, 2014 AT 5:07 PM
Tiny
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Battery is charged and fine and im getting between 2.5-3v on the red wire you wanted me the check
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Friday, April 11th, 2014 AT 5:10 PM
Tiny
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If I jump a wire straight from my battery to the purple starter wire it cranks just fine
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Friday, April 11th, 2014 AT 5:14 PM
Tiny
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That's not gonna make it-you need more than that

Run a wire from the battery positive post straight to the relay red wire and see what happens-Sounds like the computer is not grounding out the relay to transfer the starter control circuit to the starter motor
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Friday, April 11th, 2014 AT 5:18 PM
Tiny
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If you wish you can use a push button
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Friday, April 11th, 2014 AT 5:20 PM
Tiny
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Ok ill try that and let you know what happens
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Friday, April 11th, 2014 AT 5:24 PM
Tiny
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Ran a new wire and it fired right up thanks for all the help
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Sunday, April 13th, 2014 AT 4:24 PM
Tiny
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You're welcome
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Sunday, April 13th, 2014 AT 7:18 PM

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