1981 Ford Fairmont 1981 Ford fairmont Charging systems prob

1981 FORD FAIRMONT
81,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
ALIVETOKNOW
  • MEMBER
  • 2 POSTS
So, my battery dies while I'm driving my car. It's a brand new battery. I check the terminals and one is loose so I tighten one, replace the other.

The car runs a few days no problem, but then my battery dies again, but after I park. The first time it stalled, now it will run, but as soon as you turn it off the battery is dead.

I took the new battery and the alternator to the auto store to see if there's any problems. They say no, they both test good. I buy a voltage regulator thinking that must be the problem. I reinstall the old alternator and the new voltage regulator. The auto store charged the battery so the car fired right up. After a half hour of use, I park it and it happens again. No juice in the battery.

Is there anyway the alternator is bad, even though it test 13.8?

I was just wondering if there was any suggestions before I take it in. It's christmas time and I'd really like to save a buck.
Dec 12, 2009 at 8:15 PM
Advertisement
Avatar
MHPAUTOS
  • CERTIFIED EXPERT
  • 31,937 POSTS
HI there, that charge rate is OK, did they do a load test on the battery? this is the only real test for battery condition.

Mark (mhpautos)
Dec 12, 2009 at 8:20 PM
Avatar
ALIVETOKNOW
  • MEMBER
  • 2 POSTS
I took the battery and the alternator with me so they could check them. They said the battery is good, but it's been drained a few times so they charged it for 35 minutes. I'm assuming they did a load test, but I can't say for certain.
Dec 13, 2009 at 8:24 AM
Advertisement