Starting, charging, and battery question
We're getting hit by Hurricane Matthew and i haven't really had ability to figure my son's 91 LX issue out. But here's what happened. He calls Thursday night and battery was completely discharged (checked w/voltmeter). But no warning the previous day. I checked the alternator once we got it jumped, and it was putting out 'marginal' charge voltage, just a tad above 12V. The battery was old enough and there was so much rain I went ahead and got a new one. He drove the car not even 24 hours and less than 7 miles on two trips in the city, and it is now discharged again! I was able to jump it quickly this time.
I can definitely trouble shoot alternator output and static battery voltage, but what would cause his battery, with normal load (no lights, no aftermarket amp/radio) to discharge so quickly? I did check the starter relay area - had forgotten about the stupid Ford fusible link harness mess and stuff. Could it be the harness between battery/relay and alternator? I've heard stories about Ford cars/trucks that catch on fire due to these.
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