No crank no start

2000 BUICK REGAL
1,100,000 MILES • 3.8L • 6 CYL • 2WD • AUTOMATIC
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HANKSTER2
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Ignition problem.
Jul 31, 2020 at 8:21 PM
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JACOBANDNICKOLAS
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Hi,

There are 4 fuses I need you to check. However, before checking the fuses, see if it starts if you place the transmission in neutral.

If it doesn't, check the fuses I circled in the attached pic. In addition to checking the fuse, make sure there is power to the fuse. Here is a link that explains how that is done:

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Let me know what you find. Also, let me know if other electrical components are working.

Take care,
Joe
Jul 31, 2020 at 10:20 PM
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HANKSTER2
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Checked all good.
Aug 11, 2020 at 5:31 AM
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JACOBANDNICKOLAS
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Okay, if the fuses are good and there is power to them, we need to check at the starter for power. On the starter, there is the larger main cable straight from the battery. That should have 12v at all times. There will be a smaller wire that should only have 12v when the key is in the start position. I need you to check for that. Here is a link that explains exactly how to check. You will need a helper.

https://www.2carpros.com/articles/starter-not-working-repair

I attached the wiring schematic for the starting system for a reference.

Let me know if this helps and what you find.

Joe
Aug 11, 2020 at 11:08 PM
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HANKSTER2
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Okay, i will. thanks
Aug 12, 2020 at 10:49 AM
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HANKSTER2
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Got fire from the ignition. i guess I'll check fire from the BCM.
Aug 13, 2020 at 4:14 PM
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JACOBANDNICKOLAS
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Hi,

I'm not sure what you are checking on the BCM. Did the starter engage?

Joe
Aug 14, 2020 at 12:24 PM
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HANKSTER2
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No, i was trying to see if the BCM was getting power to it.
Aug 17, 2020 at 3:32 PM
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HANKSTER2
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I don't know how to check it.
Aug 17, 2020 at 3:33 PM
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JACOBANDNICKOLAS
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Hi,

What to do is confirm there is no power to the smaller wire on the starter when the key is in the start position. You will need a helper to do this. I attached a link above that should be helpful. The smaller wire is purple and should only have 12v when the key is in the start position.

Once we determine if there is or isn't power to the (s-terminal) on the starter, we can go one of two directions. If there is power, chances are the starter is bad. If there is no power, we will need to work backwards to see where the power loss happens.

I attached the entire wiring schematic for the starting system on this vehicle. Also, did you check if makes a difference if the vehicle is in neutral? Do you see the P or N when the key is in the on position?

Let me know.
Joe
Aug 17, 2020 at 8:48 PM