1989 Ford F350 Charging system failing

1989 FORD F-350
189,000 MILES • V8 • 2WD • AUTOMATIC
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FRANK RAMIREZ
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  • 1 POST
My batteries wake up dead. I have replaced alternator, voltage regulator, and 1 battery that was bad, however the batteries do not keep charge. The voltage reads fine on dashboard control. I do notice that when I connect the positive clamp to my battery charger and then go to connect the negative clamp, a small spark gives off. I have checked all fuses and all are fine. I have checked all lights including domes, glovebox and lighter and these are not causing the lost charge. I suspect it must be a short under the hood but need help so I know where to start looking.
Nov 15, 2009 at 3:33 PM
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MERLIN2021
  • ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
You may have a parasitic drain check for it like this:
http://www.2carpros.com/first_things/why_is_my_car_battery_dead_over_night.htm
Nov 15, 2009 at 3:36 PM
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