bigspender101

So in the mornings when its cold out it seems that my voltage spikes from 12 to 17.5 could this be a bad VR? interior lights and radio turn off for 5 or so seconds then turn back on. And sometimes I get the ABS warnings....

03'55AMG

Either the vr or bcm

bigspender101

I forgot to add, that I just put in a new interstate battery about a month ago....

pcy

Voltage regulator mounted on the alternator.

bigspender101

Yep I know! Are you saying thats what it is PCY?

pcy

Yes, I am certain replacing the Voltage Regulator will take care of the issue.

ontmiss

+1

ontmiss

Just to add, I wouldn' even start a car before fixing, could burn lots of other things.

mleskovar

Voltage where? How are you reading this? Have you put a VM directly on the battery during this period to read it?

bigspender101

Im reading it through the display on the dash....I push the reset button 3 times and it shows me the voltage..

mleskovar

Did you put a meter across the battery at the same time to see if the reading was accurate? Since you're getting other weird failures maybe it's not your alternator but something else. Just trying to narrow it down.

bigspender101

Im going to take it in this next week and have my indy take a look at it. When he put my battery in he checked the voltage and it was fine. But the car was warm when he checked though. I might leave it overnight so he can see what i see most mornings....