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Bad Alternator??? Recent Alternator swap.

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Old Feb 19, 2021 | 05:35 PM
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Default Bad Alternator??? Recent Alternator swap.

Hey All,

I recently changed out my alternator (thanks to this awesome forum) however my battery died and when tested the alt is only reading 11 volts. I changed the 91 mega fuse however I'm getting no alternator juice. Has anyone ever purchased a bad/ faulty alternator??? I purchased the AC Delco part. I really don't want to install another alternator. Thoughts/sarcasm??? 2006 I5 by the way
 
Old Feb 19, 2021 | 05:55 PM
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You can't get 11 volts with a charged battery.



 
Old Feb 19, 2021 | 08:17 PM
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Default I'm stuck like chuck

I guess I'm stuck then. Thanks for the insight.
 
Old Feb 20, 2021 | 08:26 AM
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Default Fyi


 
Old Feb 20, 2021 | 09:00 AM
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You can startup with 11.8vlts? Fully charge the battery, and put that meter to work, start by checking powers and make sure there is ground at the alternator, check fuse 7, remove fuse 32, test alternator output when battery resting voltage is 12.6+. Btw, new battery terminals should be on your to-do list.



 
Old Feb 20, 2021 | 10:43 AM
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Originally Posted by hummerz
You can startup with 11.8vlts? Fully charge the battery, and put that meter to work, start by checking powers and make sure there is ground at the alternator, check fuse 7, remove fuse 32, test alternator output when battery resting voltage is 12.6+. Btw, new battery terminals should be on your to-do list.


thanks for the response...I will try this now and I have the new terminals and definitely need to put them on based on the threads I have read. Do you have cashapp?
 
Old Feb 20, 2021 | 11:41 AM
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Default Thanks for your help.

Originally Posted by 06H3803
thanks for the response...I will try this now and I have the new terminals and definitely need to put them on based on the threads I have read. Do you have cashapp?

this is with the 32 fuse removed. Looks like I'm cooking with gas now.
 
Old Feb 20, 2021 | 12:38 PM
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What's the voltage at startup? (probe at the wire under the tape before the terminals) Should be 15v+
 
Old Feb 21, 2021 | 03:08 PM
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Default Multimeter reading

Originally Posted by hummerz
What's the voltage at startup? (probe at the wire under the tape before the terminals) Should be 15v+

Alternator output.

Behind the terminals.
 
Old Feb 21, 2021 | 03:43 PM
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2v drop?

change those battery terminals, clean/secure/seal wires & recheck!




 

Last edited by hummerz; Feb 21, 2021 at 03:46 PM.



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