Bouncing gauges and no start
03-22-2016, 05:16 PM
#21
Moderator
Join Date: 01-23-2009
Location: Fredericksburg,VA
Posts: 24,898
Regulators regulate.
12.8 to 15 sounds like what I was reading when I was monitoring mine.
The place that tested the battery could have tested the alternator and starter at the same time same machine.
I think you should be checking the ground connections before you spend more money.
12.8 to 15 sounds like what I was reading when I was monitoring mine.
The place that tested the battery could have tested the alternator and starter at the same time same machine.
I think you should be checking the ground connections before you spend more money.
03-22-2016, 05:19 PM
#22
Platinum Member
Join Date: 12-06-2009
Location: Alabama
Posts: 11,162
A fluctuation in battery voltage doesn't always mean the alternator.
And FWIW. The regulator is NOT in the alternator. It is controlled by the BCM or ECM. (can't remember which )
You could have a ground issue, or the alternator or battery possibility. Not sure how you got the battery tested without a full cycle charge on it. (i.e. it was dead. You jumped it off, then only drove it to get it tested ? )
Anyhow. If you pull the alternator anyway, I would suggest having it bench tested to avoid replacing it for no reason.
And FWIW. The regulator is NOT in the alternator. It is controlled by the BCM or ECM. (can't remember which )
You could have a ground issue, or the alternator or battery possibility. Not sure how you got the battery tested without a full cycle charge on it. (i.e. it was dead. You jumped it off, then only drove it to get it tested ? )
Anyhow. If you pull the alternator anyway, I would suggest having it bench tested to avoid replacing it for no reason.
03-22-2016, 05:27 PM
#23
Member
Thread Starter
Join Date: 02-23-2016
Location: Western ma
Posts: 37
Regulators regulate.
12.8 to 15 sounds like what I was reading when I was monitoring mine.
The place that tested the battery could have tested the alternator and starter at the same time same machine.
I think you should be checking the ground connections before you spend more money.
12.8 to 15 sounds like what I was reading when I was monitoring mine.
The place that tested the battery could have tested the alternator and starter at the same time same machine.
I think you should be checking the ground connections before you spend more money.
03-22-2016, 05:29 PM
#25
Member
Thread Starter
Join Date: 02-23-2016
Location: Western ma
Posts: 37
A fluctuation in battery voltage doesn't always mean the alternator.
And FWIW. The regulator is NOT in the alternator. It is controlled by the BCM or ECM. (can't remember which )
You could have a ground issue, or the alternator or battery possibility. Not sure how you got the battery tested without a full cycle charge on it. (i.e. it was dead. You jumped it off, then only drove it to get it tested ? )
Anyhow. If you pull the alternator anyway, I would suggest having it bench tested to avoid replacing it for no reason.
And FWIW. The regulator is NOT in the alternator. It is controlled by the BCM or ECM. (can't remember which )
You could have a ground issue, or the alternator or battery possibility. Not sure how you got the battery tested without a full cycle charge on it. (i.e. it was dead. You jumped it off, then only drove it to get it tested ? )
Anyhow. If you pull the alternator anyway, I would suggest having it bench tested to avoid replacing it for no reason.
I'm going to do a bench test on the battery friday to be sure. I have the Alt if needed so I'll be checking grounds and the batt as I normallywould. Full charge then load test
03-22-2016, 05:32 PM
#26
Member
Thread Starter
Join Date: 02-23-2016
Location: Western ma
Posts: 37
03-22-2016, 05:33 PM
#27
Moderator
Join Date: 01-23-2009
Location: Fredericksburg,VA
Posts: 24,898
03-22-2016, 06:06 PM
#28
Member
Thread Starter
Join Date: 02-23-2016
Location: Western ma
Posts: 37
03-25-2016, 09:37 AM
#29
Member
Thread Starter
Join Date: 02-23-2016
Location: Western ma
Posts: 37
So I ended up needing a battery. Funny thing is now driving voltage is back to 14.5 pretty constant. No once has it dropped to 12.6v. Pretty odd the way these thing regulate voltage in my opinion.
Did check some grounds also while I was at it and they all look secure.
Thanks guys for your help.
Did check some grounds also while I was at it and they all look secure.
Thanks guys for your help.