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Changed alternator now will not start

Tiny
BGD691
  • MEMBER
  • 2004 CADILLAC DEVILLE
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
It powers up when you turn key on but will not do anything and the dash lights stay on when you turn the key off.
Thursday, July 26th, 2018 AT 1:22 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,690 POSTS
When you replaced the alternator did you disconnect the battery? If not was there any sparking from the main power wire? Because it sounds like the fusible link is blown. Here is a diagram and guide to help us get started. Check for power at the alternator which will tell us whats going on. With the key on you should have power at the red wires.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (below). Please let us know what you find.

Cheers, Ken
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Sunday, July 29th, 2018 AT 1:17 PM
Tiny
BGD691
  • MEMBER
  • 2 POSTS
I found the problem. I left the ground wire off one of the alternator bolts.
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Monday, July 30th, 2018 AT 2:08 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,690 POSTS
Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
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Tuesday, July 31st, 2018 AT 10:46 AM

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