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What would cause a battery to drain after 3 days on a 1990 F-150 their are no obvious shorts?
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The fact that it takes 3 days probably points to the alternator not charging, but a faulty voltage regulator can cause this also if you know for a fact that the battery is good. Attach a voltage tester to the battery and monitor the volts as you disconnect the wire connector to the alternator, if it jumps up to 13 volts or so then the draw is there. Otherwise you can do the same test and disconnect various fuses to try and track down the item that is giving you trouble. A constant draw will probably make your battery read 12 volts or less when it should be up around 13 or 14.
What else can I help you with?
Could an alternator drain the battery on a ford escort gti?
Absolutely. If a diode shorts to ground it can drain a battery in a very short time.
What could cause a 1993 Jeep Grand Cherokee battery to drain overnight when nothing obvious left on?
bad ignition switch, bad battery, bad alternator/regulator,
Battery drainage on 1997 Chrysler town and country and is not alternator could it be that the radiator needs flushing which it does but would it cause battery to drain?
A raidator in need of a flush will not cause a battery drain.
Will a bad soleniod cause the battery to drain?
Highly unlikely.
Can wrong spark plug wire cause a car to die or drain battery?
The wrong spark plug wire(s) can cause engine problems including not running but won't drain the battery.
Will a crack in a car battery post cause it to drain power?
Yes it can.
What could drain the battery on a 2002 geo prism other than the alternator or starter?
A dead cell in the battery will cause it to loose it's charge overnight. The only fix is to replace the battery. Any light that is staying on will drain the battery. Also a stuck relay will drain the battery.
What can cause battery drain on a 1995 mercury marquis?
Dead cell in the battery. Something on which is drawing power from the battery. Stuck relay.
What would cause the battery to drain when the lights are on in a 2002 KIA when the alternator is good and battery is good?
A short in the wiring.
What could cause the battery to drain on a 91 Chevy Lumina?
there is a short some where in the electrical system... or a bad battery.
Can a bad dome light cause the battery to discharge when the engine is off?
If it stays on all the time it will drain the battery
What reason that cause battery drain?
Dead cell in the battery, any light on the car that is staying on, or a stuck relay.
