Electrical Problem..

[94STANGTNY]

I have a 94 GT .... A couple of days ago I go and try to start my car and the battery was dead. I got a boost left the car running about 30 minutes and turned it off. Later on about 5 hours later the battery was dead again. So the next morning i bought a new battery and still had the same problems. I also had bought a new alternator about 1 month ago. Today I got another boost and I waited for 10 minutes and then turned the car off. I disconnected the neg battery terminal and connected a tester to the terminal and to the neg. cable the light was on. I pulled out the Convertible Top Motor fuse from the Power distribution box and the tester light went out. I turned on the car and the battery charge level stays low, compared to when the fuse Convertible Top motor fuse was in... the battery gauge would read normal but the battery would die out if the car was not being used. Does anyone have any idea what my problem could be.

 

[HISSIN50]

Do the same test but with your meter set to amperage draw (dont forget to change the positive meter lead position). Tell us what you see with the vert item in place and with it pulled.

If you have an issue with your battery connections (battery cables to posts), this issue can occur. When you jump it, you connect your jumper cables to the car's cables, which powers the car. But under its own power, the alternator's charge is not stored in the battery because of a resistive connection.

Otherwise, a new alternator or battery does not mean a good one. I've had both test bad at the parts store (brand new - before I even paid for them).

Good luck.