parasitic power draw
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i ain't rite
Joined: Mar 2005
Posts: 65,505
Likes: 5,563
From: Marlboro Mental Hospital.
parasitic power draw
on one of the 99 crown vics, i am getting .58 amps draw with everything turned off.
does this sound like a bad diode in the alternator??
if left sit for 2 days, it will kill the battery.
does this sound like a bad diode in the alternator??
if left sit for 2 days, it will kill the battery.
FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
Most all vehicles today have SOME current draw with everything off. Computer, radio (to maintain station selection), etc. Don't know HOW much. but a 1/2 amp is prob close to right. How old are (is) the batteries (battery).
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i ain't rite
Joined: Mar 2005
Posts: 65,505
Likes: 5,563
From: Marlboro Mental Hospital.
all 6 batteries i have are less that 6 months old.
i do not test with a battery hooked up. i got the .58 amp draw with the amp meter hooked up between the pos cable and the pos terminal on a fully charged battery.
initial draw is .96 amp, then once the computer and radio are done with the surge i get the .58
that seems like a very high draw though. i was figuring on more like a .002 amp draw.
i do not test with a battery hooked up. i got the .58 amp draw with the amp meter hooked up between the pos cable and the pos terminal on a fully charged battery.
initial draw is .96 amp, then once the computer and radio are done with the surge i get the .58
that seems like a very high draw though. i was figuring on more like a .002 amp draw.
Cargo Master
Joined: Mar 2008
Posts: 2,568
Likes: 207
From: Washington
all 6 batteries i have are less that 6 months old.
i do not test with a battery hooked up. i got the .58 amp draw with the amp meter hooked up between the pos cable and the pos terminal on a fully charged battery.
initial draw is .96 amp, then once the computer and radio are done with the surge i get the .58
that seems like a very high draw though. i was figuring on more like a .002 amp draw.
i do not test with a battery hooked up. i got the .58 amp draw with the amp meter hooked up between the pos cable and the pos terminal on a fully charged battery.
initial draw is .96 amp, then once the computer and radio are done with the surge i get the .58
that seems like a very high draw though. i was figuring on more like a .002 amp draw.
Jim
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i ain't rite
Joined: Mar 2005
Posts: 65,505
Likes: 5,563
From: Marlboro Mental Hospital.
thanks for the tip Jim. but i eliminated the alternator as the culprit today, when i unplugged it and got no change.
the trunk light switch was bad. unplugging the trunk light brought the drain down to .31 amps.
300 milliamps is a lot better, but i think i still have another light staying on. i am thinking it should be more like 50 or 100 milliamps shut off.
the trunk light switch was bad. unplugging the trunk light brought the drain down to .31 amps.
300 milliamps is a lot better, but i think i still have another light staying on. i am thinking it should be more like 50 or 100 milliamps shut off.
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