96 gt starting issue

[oneal1rider]

Hey whats up ppl. My babys not feelin to well. She dont wanna start on her own. Theres a problem somewhere and I cant seem to pinpoint it. If I jump start it or put a new battery in itll start up perfect, but if I turn it off and try restarting it it doesnt have enough voltage to start. Any ideas? Somethin is obviously draining the battery real quick. Any opinions or solutions would be great. Thanks

 

[MustangChris]

get your alternator tested.
get your battery tested.

 

[oneal1rider]

Brand new alternator. Brand new battery. Starts up fine once I connected the new battery. After turning it off and trying to restart it doesnt start

 

[MustangChris]

check your grounds.

does it have an aftermarket sterio/electrical system? sometimes a wire can rub, break open, and the wire can rub on a metal part of the car draining the battery.

 

[oneal1rider]

No aftermarket electrical shit. Ive checked all grounds. But its obviously something draining the battery with the car off cuz once its on it runs fine and wont lose voltage. Its when I turn it off that voltage drops a significant amount and wont restart the car

 

[joekd]

Use a meter and measure volts at battery off then at idle, make sure the system is charging before you do anything else

Also don't skip the simple things, make sure your terminals are clean and tight

 

[oneal1rider]

The charging system is fine. Apparently nobodys had this problem before. I was hopeing someone had. Ill have to dig into it and figure it out somehow