Alternator not charging.. help!

[Ny Mustang Guy]

just replaced the alternator and charged my battery..

with the car off the battery reads 12v... with the car on the battery reads slightly over 12v

what gives?..

 

[Ny Mustang Guy]

i have the old style alt also.. external regulator... the three posts in the back are red: Batt White: Cant make it out... and Black: Sta...

 

[bill302]

bad regulator remove it and have it tested it at any autoparts store i know autozone tests them and a new one cost about $15....

 

[Ny Mustang Guy]

bought one.. and replaced the old one.. still didnt charge

I ended up buying a 1wire 100Amp Alt..
Long story short.. I needed a good engine to chassis ground!! (being that I put my battery to the back..)

 

[bill302]

click on thread link below and scroll down to jrichkers post and read about proper ways for running grounds.hope it helps...

http://forums.stangnet.com/showthread.php?t=621008&highlight=battery+installation