HELP!!! No start issue.
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Senior User
Joined: Sep 2005
Posts: 209
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From: Montague,ma.
Is this Testing them Unhooked with your DVM Right??
A Fulley Charged Battery Tested UNHOOKED Should be at 12.68 Volts
When you Have the Truck running and the ALternator is Charging you want to see 13.5 Volts Up into the 14.3-5 volts range But this is with Truck RUNNING With ME?????
A Fulley Charged Battery Tested UNHOOKED Should be at 12.68 Volts
When you Have the Truck running and the ALternator is Charging you want to see 13.5 Volts Up into the 14.3-5 volts range But this is with Truck RUNNING With ME?????
By the way here's the link to the thread I mentioned before:
https://www.ford-trucks.com/forums/1...-idle-mod.html
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Senior User
Joined: Sep 2005
Posts: 209
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From: Montague,ma.
No. Turn the key to on or acc. and the radio came on tuned to AM 530. Turn the key to start and all I got was a clicking noise. Stopped trying when jswartz said if I kept trying I could kill the ficm.
Cargo Master
Joined: Jun 2007
Posts: 2,723
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From: Roseburg, OR
Which points to dead batteries.
Fleet Owner
Joined: Nov 2003
Posts: 27,919
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It is good to know the "work-arounds" on battery testing, but why discourage the OP from actually having each one load tested - a proper load test will always tell you more than a voltage check. It truly is the best place to start!
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Senior User
Joined: Sep 2005
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From: Montague,ma.
No. Left them on the charger for several hours and they never got over 12.4v.
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Hotshot
Joined: Apr 2010
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From: Saratoga Springs,UT
Your right. I probably sent 12 volts to the pcm. I tried following the instructions on the mod. No one said anything about only 5 volts. As a matter of fact, I asked about this in another thread I'd started and was told I could hook up to any 12v wire as I didn't have the ability to install the upfitter switches.
The Colors you have at Least the "BCPSW Circuit" is OK to Give 12 volt
INPUT (VPWR)
BCPSW
PCM Pin C1-09 Circuit No. 2248 Wire Color: Purple / Lt. Green
• Applying vehicle battery voltage to this wire begins BCP.
• Engine speed is sent to 1200 rpm when all safety enablers are met, regardless of the degree
of battery charge.
• After 1200 rpm, BCP regulates engine speed based upon the degree of battery charge, up to
2400 rpm maximum
The Other way was adjustable Idle control that uses V-Ref 5 volt or less
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Senior User
Joined: Sep 2005
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From: Montague,ma.
The more I think about it, I think I'll take the batts. and the alternator to Autozone for testing. It's free and can't hurt anything. Right?
Cargo Master
Joined: Jun 2007
Posts: 2,723
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From: Roseburg, OR
Great idea. Won't hurt anything.
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 242
From: Saratoga Springs,UT
It looks like you Ran it way down cranking and the PCM has reset
So maybe all the cranking Killed them?? IDK Charge them for 12 Hours
This where the Hydro test comes in Handy
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Senior User
Joined: Sep 2005
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From: Montague,ma.
Hotshot
Joined: Apr 2010
Posts: 19,072
Likes: 242
From: Saratoga Springs,UT
If it only bad batterys they Picked a Heck of a Time to Go Bad LOL
Has thte battery light been coming on latly??
What does the wire you got power from do with Key out Ignition??? I just wonder if it hooked up in a Way to Drain the Batterys But IDK what circuit
Has thte battery light been coming on latly??
What does the wire you got power from do with Key out Ignition??? I just wonder if it hooked up in a Way to Drain the Batterys But IDK what circuit