Changed alternator now will not start

2004 CADILLAC DEVILLE
200,000 MILES • 4.6L • V8 • 2WD • AUTOMATIC
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BGD691
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  • 2 POSTS
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.
Jul 26, 2018 at 1:22 PM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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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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Jul 29, 2018 at 1:17 PM
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BGD691
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I found the problem. I left the ground wire off one of the alternator bolts.
Jul 30, 2018 at 2:08 AM
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STRAILER
  • AUTOMOTIVE REPAIR CONTRIBUTOR
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Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
Jul 31, 2018 at 10:46 AM