• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

battery being overcharged in 06 gt

reallyfast1

reallyfast1

New member
So my battery in being overcharged and i have no clue why.. when i start it it will read 13v and then creep up to 15+v has anybody had this issue??
 


The alternator's output is regulated at about 14.5 volts. What you're seeing seems normal.
 
This isnt normal i had it running for 20min and it reached 16v. i changed alts changed pcms and still climbs. i blew a cell in a battery already and had it replaced. ive been told the bcm controls charging and there could also be a reset after changing batteries? Could something be wrong with the bcm?
 
I think the PCM monitors the battery voltage and if it goes to high then the SES should illuminate.
 
I have 2 alts.. bought a remand last year from napa.. Didnt fix problem.. i have 2 pcm's they didnt change anything.. went for drive to get coffee today and it climbed to 15.5v and without engine running the batt was @ 12.7v.. yesterday driving for 20 min the battery saver active came up on dic . its weird!
 


i went through 3 rebuilt alt's in a row, in 3 days, 2 of them were over charging, way over 14 v. they all tested good at the store, but were bad. they shouldn't put out more than 14.3 i believe.

so get another alt, the last one you bought may be under warranty still, 90 days i think. they will just keep giving you a new one no questions asked. at least i had no problems, and went to 2 different stores. duracrap too from autozone. you do need the receipt.
 
I've never had good results with alt from napa. Went through 5 on one guys car before we got a good one
 
You must log in or register to reply here.
Back
Top