2003 Pontiac Grand Prix Starter

Tiny
NORTHSIDE1221
  • MEMBER
  • 2003 PONTIAC GRAND PRIX
  • 3.1L
  • V6
  • FWD
  • AUTOMATIC
  • 140,000 MILES
Hi fellas im having a problem with a no start on this car. The relay clicks, the neutral safty switch has power to the yellow wire (12v)with the key in the start position when unpuged but when I plug the wire in it no longer has power to the wire. The purple wire has no power out of the switch. I cut the purple wire and then had power all the way down to the splice, so I ran a jumper wire from their to the starter. Still nothing. So I un hooked the jumper from the starter and had power to my test light but it losses power when connected to the starter. I can jumper the starter strait from the battery and it will crank.
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Friday, November 27th, 2015 AT 10:54 AM

10 Replies

Tiny
WRENCHTECH
  • EXPERT
Sounds like the starter may be shorted out. Try using a jumper wire to supply power to the small terminal of the starter and see if it cranks then.
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Friday, November 27th, 2015 AT 11:36 AM
Tiny
NORTHSIDE1221
  • MEMBER
I can jumper the starter from the battery and the car starts up. The yellow wire going to the neutral safty switch has 12 volts when unpuged then loses power when connected to the starter
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Friday, November 27th, 2015 AT 11:43 AM
Tiny
WRENCHTECH
  • EXPERT
Try running your jumper wire to that yellow wire and see what happens.
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Friday, November 27th, 2015 AT 11:45 AM
Tiny
NORTHSIDE1221
  • MEMBER
Still nothing. The yellow wire will hold 12volt until I connect it to the little starter wire then its like someone shuts the key off. Even with one end of the yellow wire connected to a test light the light goes off when I ground the wire.
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Friday, November 27th, 2015 AT 11:58 AM
Tiny
WRENCHTECH
  • EXPERT
Did you jump a separate jumper wire with power to the yellow wire as I asked you to?
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Friday, November 27th, 2015 AT 12:01 PM
Tiny
NORTHSIDE1221
  • MEMBER
Yes. It will crank if I jumper the yellow wire with battery voltage applied
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Friday, November 27th, 2015 AT 12:19 PM
Tiny
WRENCHTECH
  • EXPERT
If that's the case your problem is in the ignition switch or the power supply to it. Take that same jumper wire with power and jump it to the red with white wire at the ignition switch and see if turning the switch engages the starter. If it does in that test, the problem is the incoming power to the switch. If not, the problem is in the switch or it's connection.
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Friday, November 27th, 2015 AT 12:24 PM
Tiny
WRENCHTECH
  • EXPERT
PS, there is no relay in this circuit so whatever you are hearing is unrelated.
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Friday, November 27th, 2015 AT 12:25 PM
Tiny
NORTHSIDE1221
  • MEMBER
The yellow wire from the "New" ignition switch had a bad connection. Problem fixed! Awesome Job! Thank you!
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Friday, November 27th, 2015 AT 1:35 PM
Tiny
WRENCHTECH
  • EXPERT
Glad to hear it.
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Friday, November 27th, 2015 AT 1:38 PM

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