Ford F150: Battery Dies Overnight
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Date: 2020-08-05
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Comments and reviews: 10
Jasper
I have a 2005 Toyota sienna. The alternator was only putting out 12. 5ish. You could jump start the van and it would keep running but idling very low and sometimes it would cut off and would not start back up unless I jump started it again.
Replaced the alternator.
And now it would charge the battery and was running fine during the day. But the battery would dye overnight and be completely dead next morning.
I took it to AutoZone for them to test it on and off the van and it tested good. It was only 3 years old.
But to rule out the battery being the problem I put another battery on it (not new but used) and let it sit for a night again. It's been 3 nights and the van has been starting just fine.
What's interesting is that that battery is on a different car now and it won't dye overnight
reply
I have a 2005 Toyota sienna. The alternator was only putting out 12. 5ish. You could jump start the van and it would keep running but idling very low and sometimes it would cut off and would not start back up unless I jump started it again.
Replaced the alternator.
And now it would charge the battery and was running fine during the day. But the battery would dye overnight and be completely dead next morning.
I took it to AutoZone for them to test it on and off the van and it tested good. It was only 3 years old.
But to rule out the battery being the problem I put another battery on it (not new but used) and let it sit for a night again. It's been 3 nights and the van has been starting just fine.
What's interesting is that that battery is on a different car now and it won't dye overnight
reply
Jim
I'm dealing with a similar issue with an 01 F150 Super-crew. Battery was going dead every few days, then overnight, and now with-in hours. I'm waaay to old to work on my cars now but being a senior citizen on a very fixed income, i have no choice. The alternator & battery are both 3 years old so could be either one I guess. Only other variable is that the back window leaked for abut a year b4 i had the to fix it. So, the inside of the cab would get lots of condensation. Maybe a corroded connection somewhere or bad ground? Wish I could afford that PICO setup you have. Thoughts/suggestions on troubleshooting?
reply
I'm dealing with a similar issue with an 01 F150 Super-crew. Battery was going dead every few days, then overnight, and now with-in hours. I'm waaay to old to work on my cars now but being a senior citizen on a very fixed income, i have no choice. The alternator & battery are both 3 years old so could be either one I guess. Only other variable is that the back window leaked for abut a year b4 i had the to fix it. So, the inside of the cab would get lots of condensation. Maybe a corroded connection somewhere or bad ground? Wish I could afford that PICO setup you have. Thoughts/suggestions on troubleshooting?
reply
Joe
I'm a 62 year old tech, and the fancy equipment slowed you down. I have that stuff as well however with any Ford the alternator is almost always the drain. The diodes go bad and if you remove the belt, you will see the alternator has turned into a motor. Many times the alternator will keep the engine spinning if its shorted the right way, yes with that small of a pulley it will turn the engine. Some things seem to never change.
Thanks for the demo, try my belt off alt turned to motor. Kind of cool!
reply
I'm a 62 year old tech, and the fancy equipment slowed you down. I have that stuff as well however with any Ford the alternator is almost always the drain. The diodes go bad and if you remove the belt, you will see the alternator has turned into a motor. Many times the alternator will keep the engine spinning if its shorted the right way, yes with that small of a pulley it will turn the engine. Some things seem to never change.
Thanks for the demo, try my belt off alt turned to motor. Kind of cool!
reply
Marquice
Ooo looked at that she turned on nicely fancy
Few seconds
Chinese junk
I just bought a 2010 f150 xlt 5. 4 and it died two nights in row had to use jump pack Im gonna get the battery and alt checked tomorrow but just been looking at videos cause I usually try fix everything myself on my cars that I can and this video was funny yet very informative wish more like you existed then I wouldnt mind dropping something off knowing it wouldnt just get the parts cannon shot at it
reply
Ooo looked at that she turned on nicely fancy
Few seconds
Chinese junk
I just bought a 2010 f150 xlt 5. 4 and it died two nights in row had to use jump pack Im gonna get the battery and alt checked tomorrow but just been looking at videos cause I usually try fix everything myself on my cars that I can and this video was funny yet very informative wish more like you existed then I wouldnt mind dropping something off knowing it wouldnt just get the parts cannon shot at it
reply
mindtouchone
The currant draw produces heat and heat causes more resistance and more currant draw and this sets up a type of vicious circle where the amp draw can increase over time. You can prove this with a glass top electric stove. If you turn a burner element to 300 degrees and you can see the red glow on the element but it doesn't stay glowing, it turns on and off to maintain the commanded heat. If the control system stayed on all the time the heat would rise and rise.
reply
The currant draw produces heat and heat causes more resistance and more currant draw and this sets up a type of vicious circle where the amp draw can increase over time. You can prove this with a glass top electric stove. If you turn a burner element to 300 degrees and you can see the red glow on the element but it doesn't stay glowing, it turns on and off to maintain the commanded heat. If the control system stayed on all the time the heat would rise and rise.
reply
Jason
I have a 12. 5 volt draw on my 2000 f150 discovered by multimeter. I clipped the clip of test light to positive and taped the light to negative post which of course left the light on. pulled each fuse and relay one by one under hood and dash and the light stayed on. So does that mean none of those was the cause of that kind of draw? Brand new alternator. system charging at 13. 9. and battery by itself 12. 8. I'm lost
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I have a 12. 5 volt draw on my 2000 f150 discovered by multimeter. I clipped the clip of test light to positive and taped the light to negative post which of course left the light on. pulled each fuse and relay one by one under hood and dash and the light stayed on. So does that mean none of those was the cause of that kind of draw? Brand new alternator. system charging at 13. 9. and battery by itself 12. 8. I'm lost
reply
Robert
I've got a 2008 Chrysler Sebring 3. 5 V6 with a lot of the same problems and more. My housekeeper suggested it could be the alternator so I disregarded that right away. Besides taking the new battery completely down over one or sometimes two nights it has a problem with the transmission not shifting into 2nd, 3rd or 4th overnight. I have no idea if these two intermitent problems are related but they do seem to be.
reply
I've got a 2008 Chrysler Sebring 3. 5 V6 with a lot of the same problems and more. My housekeeper suggested it could be the alternator so I disregarded that right away. Besides taking the new battery completely down over one or sometimes two nights it has a problem with the transmission not shifting into 2nd, 3rd or 4th overnight. I have no idea if these two intermitent problems are related but they do seem to be.
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Is
Sir you have some serious dedication. and talent. can't stop watching your videos I need to get a life? but they are very interesting and they always have a good outcome. kind of like a sitcom but you're actually edumacated afterwards. hey that's a good idea you might be the next fixer upper but for cars. TLC Broadcasting where are you?
reply
Sir you have some serious dedication. and talent. can't stop watching your videos I need to get a life? but they are very interesting and they always have a good outcome. kind of like a sitcom but you're actually edumacated afterwards. hey that's a good idea you might be the next fixer upper but for cars. TLC Broadcasting where are you?
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Android
The Alternator has a rectifier inside made of 4 diodes. if the boundaries of any diode gets weak with heat can weaken the boundary allowing current to go the other way creating a amp draw. that is my theory. What do you think?
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The Alternator has a rectifier inside made of 4 diodes. if the boundaries of any diode gets weak with heat can weaken the boundary allowing current to go the other way creating a amp draw. that is my theory. What do you think?
reply
backyard
Same problem with my 99 mercury cougar so I just disconnected my battery on my car which has the 3. 0 v6 no lights are on and all doors are closed including my hatch sorry I was wrong my car has a 2. 5 Liter v6
reply
Same problem with my 99 mercury cougar so I just disconnected my battery on my car which has the 3. 0 v6 no lights are on and all doors are closed including my hatch sorry I was wrong my car has a 2. 5 Liter v6
reply
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