battery dies new battery & altenator

[WICKED TURBO T]

hi guys my 87 turbo t has been having a problem. i changed my altenator & my battery & the ground wire for the battery. why is my car dying even while driving. isn;t that when it is supposed to be charging? i am stumped. someone hel p please.

 

[scottyb]

You need a voltmeter. Test the voltage at the alternator, then the voltage at the battery. I had a problem with a different car that made ~14volts at the alt, but a hair under 12 at the battery. Therefore the battery would slowly die cause it wasn't getting sufficient charge after continuous starts. I started the car, then removed the positive cable from the battery to test its voltage supply. The positive cable was badly corroded inside.

 

[WICKED TURBO T]

thanks man i will check the positive wire out. i'll keep you posted. btw i did change the ground cable

 

[Joe 1320]

FYI, if the dash light doesn't come on, the battery will not charge.