Help Alternator wont charge Solution LOL
Thread Starter
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Hotshot
Joined: Apr 2010
Posts: 19,061
Likes: 238
From: Saratoga Springs,UT
Help Alternator wont charge Solution LOL
Hey guys down here Helping BIG ATV Carl again and I asm coming up the Same as Before
Dam Alternator wont charge
I ran thru the pin point test and every time the same replace Generator
Well he Has
He has been told it good
Every test Says NO
How many Milli Volts to make a Volt??? 100??
I been testing my truck to when I checked I circuit and A circuits
the main red to battery checks at 27 MIlli volt drop same as mine
what am I missing
Oh the Battery/Charging warn light Turns on at KOEO But not when Idling here Running in driveway WHY ITS JACKED UP
The FICM is Droping out at 39 volts Its Cleariy taking a Beating from the Alternator Not charging
Dam Alternator wont charge
I ran thru the pin point test and every time the same replace Generator
Well he Has
He has been told it good
Every test Says NO
How many Milli Volts to make a Volt??? 100??
I been testing my truck to when I checked I circuit and A circuits
the main red to battery checks at 27 MIlli volt drop same as mine
what am I missing
Oh the Battery/Charging warn light Turns on at KOEO But not when Idling here Running in driveway WHY ITS JACKED UP
The FICM is Droping out at 39 volts Its Cleariy taking a Beating from the Alternator Not charging
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
Milli = 1000, so 1000 milli volts per volt. How many volts at the charge wore at start up and then after Gps are off? Mine charges at 14.4 to 14.8, but it takes a bit before it senses to start charging hard. How good are cables, clamps and grounds? Are batteries all topped up with deionized water and are all cells reading the same specific gravity? One bad cell will do what looks like a poorly working alternator. If you can measure SG of each cell, then have them load tested individually. A good charger on the batteries before trying to test batteries for load and to start the truck and check FICM is a good idea.
Thread Starter
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Hotshot
Joined: Apr 2010
Posts: 19,061
Likes: 238
From: Saratoga Springs,UT
Alternator Bench Test GOOD
Alternator Volts Comes UP with RPMS to 13.5Volts
But as soon as RPM Drops NO More CHARGE Goes Down to 11.8-12.0Volts at Idle
Alternator Volts Comes UP with RPMS to 13.5Volts
But as soon as RPM Drops NO More CHARGE Goes Down to 11.8-12.0Volts at Idle
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Postmaster
Joined: Jul 2011
Posts: 3,263
Likes: 0
From: Houston, TX
question. if starter is bad or bad wire to starter, won't it also drain watever charge there is too?
i'm just trying to cover the possibilities.
the last time funky stuff happened to me, damn alternator took out my batteries or vice versa. watever it is, i had to replace the alternator, and i changed my pigtail connector as well. u can get tat from auto zone and splice it in.
fortunately, both my motor crafts are still under warranty but the ford dealership only replaced one since the other one was replaced just before the alternator went out. they charged it back up but about a year later today, it leaked. so they changed it. i told ford to create a case number, then i spoke to the manager at the parts department, and she changed it out no problems. lol.
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Elder User
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you won't even charge the battery at 13.5 volts. you have to have enough
voltage above the static level of the batteries, to overcome the resistance
of the plates, so they will accept a charge.
with AGM batteries, you are looking at 14.5~14.8 volts to get it done.
Postmaster
Joined: Jul 2011
Posts: 3,263
Likes: 0
From: Houston, TX
that is low.... the alternator is toast.
you won't even charge the battery at 13.5 volts. you have to have enough
voltage above the static level of the batteries, to overcome the resistance
of the plates, so they will accept a charge.
with AGM batteries, you are looking at 14.5~14.8 volts to get it done.
you won't even charge the battery at 13.5 volts. you have to have enough
voltage above the static level of the batteries, to overcome the resistance
of the plates, so they will accept a charge.
with AGM batteries, you are looking at 14.5~14.8 volts to get it done.
Thread Starter
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Hotshot
Joined: Apr 2010
Posts: 19,061
Likes: 238
From: Saratoga Springs,UT
Guys I can't read your posts since I'm driving but I could be on my scan gauge when I was sitting in his cab raised me and Jen its 1500 2000 rpm edit the voltage would come up that 13.6 13.8 and charge the battery
Postmaster
Joined: Jul 2011
Posts: 3,263
Likes: 0
From: Houston, TX
if ur running ur DC power, shouldn't u be putting out higher volts like 14.4 to 14.8?
Thread Starter
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Hotshot
Joined: Apr 2010
Posts: 19,061
Likes: 238
From: Saratoga Springs,UT
Its not my truck
But when you step on the gas it starts charging
Ficm Has the classic fail symptoms
It won't start with the block heater on plug plug the block heater and then I'll start
It's dropping down into the $35 to 39 volts
But when you step on the gas it starts charging
Ficm Has the classic fail symptoms
It won't start with the block heater on plug plug the block heater and then I'll start
It's dropping down into the $35 to 39 volts
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah
Since you are there helping him pull the alternator from your truck and throw it in his and try it.