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howdy - I have a quirky 1990 F-250.
Bought it back in 2005. Had few if any problems with it - it always
started up and ran fine. Just didn't drive it much.
After 6 months, I forgot to turn off the dome light, and the battery
went dead. Replaced the battery in late 2005, and started it up and ran
it around every couple of weeks.
Started to use the cab for some tool strorage and I guess a box
something eventually fell off a pile of other boxes, and bumped up
against the power lock switch, and I guess that constantt operating of
the power door lock switch killed the second battery. So I clearned out
the cab, got a new battery, and thought my problems were solved. Went
back two weeks later, and the battery is dead again.
Borrowed a battery from a friend of mine. Followed the troubleshooting
directions in both the Haines and Chilton books.
Checked the voltage at the battery - 12.60 volts.
Revved up the throttle to 1500 RPM - went to about 13.50 volts, which
was between the 0.50 and 2.00 volts listed in the manual
Turned on the lights and heater and revved up to 2000 RPM - didn't go
above 0.40 volts - which might suggest that the alternator is not charging.
Then turned off the motor, removed the key from the ignition,
disconnected the negative terminal. Used the multimeter to see if there
was any voltage from the negative post to the clamp - there was.
Directions then said to disconnect the alternator. If there was no
voltage on the meter - the alternator is faulty. I had voltage - so it
directed me to pull each fuse out and see when the voltage wasn't
present. I pulled each fuse and the voltage was still there.
So I still don't know where there is a short that is draining my battery.
Any other ideas?
Oh - what would going to Sears or a car parts place for a charging
system check show me at this point?
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