charging issue
Thread Starter
5th Gear
Joined: Aug 2022
Posts: 5
Likes: 1
charging issue
hello i bought a 2000 c5 im having trouble with it charging new battery new alt will show a charge then it will just stop i thought it might be a lose wire but it's happening when i shut the car off i can start the car 3 - 4 times and it will go back to charging kind of or miss
any ideas ignition switch ? maybe ? have checked all the wires seem to be good and tight
did check volt at battery 12.48 not running running under 12 at battery but back of alt showing 15. 6
2000 c5 35000 miles
thanks for any help
any ideas ignition switch ? maybe ? have checked all the wires seem to be good and tight
did check volt at battery 12.48 not running running under 12 at battery but back of alt showing 15. 6
2000 c5 35000 miles
thanks for any help
Last edited by bobsvette66; Aug 24, 2022 at 04:08 PM.
Instructor
Joined: Jul 2021
Posts: 106
Likes: 52
From: Dallas, TX
Occasionally you'll get a brand new battery which won't hold a charge. I recently had a red top tested by the local battery shop to rule out any issues with that, and it came back strong. I'm still checking, but it's looking like a PO hard wired in some audio component which is always on. Also, check the date on the battery. Where I got mine from (Autozone), the guy there made sure mine was in date.
Run a voltmeter on the batt while it's running - do you see the voltage increase with higher revs (to a certain point of course). Check any grounds on that circuit as well.
Run a voltmeter on the batt while it's running - do you see the voltage increase with higher revs (to a certain point of course). Check any grounds on that circuit as well.
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Moderator, Tech Contributor
Joined: Sep 2013
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From: Cape Coral, Florida
If you see 11.54 volts at the battery with the car running but 15 volts AT the alternator you need to get underneath the car and check the alternator and battery cables at the starter solenoid…you may have a loose connection there or corrosion !!
Thread Starter
5th Gear
Joined: Aug 2022
Posts: 5
Likes: 1
i did check the wiring at the starter looks good and its tight the strange thing is it will charge at times but if i cut the car off and start again it will not be charging have to shut it off 3 or 4 times and then it will be charging again im starting to think ignition switch
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,434
Likes: 3,981
From: Cape Coral, Florida
i did check the wiring at the starter looks good and its tight the strange thing is it will charge at times but if i cut the car off and start again it will not be charging have to shut it off 3 or 4 times and then it will be charging again im starting to think ignition switch
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The wire from the alternator stud runs to the solenoid where there is a fusible link. Then, the battery cable that runs to the solenoid completes the alternator to battery charging circuit. That is it, nothing special and nothing that controls charging is in this circuit.
If the voltages are not the same between the stud on the alternator and the battery then one of those wires or connections has an issue, period.
Since it will start, the battery cable is likely fine. Either the solenoid connection is dirty, the fusible link is damaged or the wire itself is damaged.
If the voltages are not the same between the stud on the alternator and the battery then one of those wires or connections has an issue, period.
Since it will start, the battery cable is likely fine. Either the solenoid connection is dirty, the fusible link is damaged or the wire itself is damaged.
Thread Starter
5th Gear
Joined: Aug 2022
Posts: 5
Likes: 1
well i found the issue its inside the starter solenoid this may sound strange but i poked it with a stick to see if wires were tight yes and it broke off right inside the solenoid crazy so now to the hard part changing the starter
crazy part the car would start with no issue whatsoever never showed sign of bad starter or solenoid
thanks
crazy part the car would start with no issue whatsoever never showed sign of bad starter or solenoid
thanks