FICM, Harness, or something else. - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 06-20-2011, 05:38 PM Thread Starter
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FICM, Harness, or something else.

I have a 2004 Ford 6.0L that died while driving a couple days ago. The
engine all of a sudden quit and when I tried cranking it felt like it
was hydrolocked. I let it set for awhile and tried cranking again and
it would start up but with excessive white smoke and oil leaking out
of the turbo into the exhaust. So i did some looking around and it
lead me to the FICM. I have a four pin ficm and I get no voltage at
anytime when I tested the post on top. After taking the ficm off the
motor and looking around for a chafe in the wiring harness (didn't
find anything) I reattached the ficm and now it doesnt start at all. I
discovered that there was a 50A fuse which I checked and sure enough
it was blown (Still no voltage.) So after replacing the fuse when I
turn the key forward or try to start it blows the fuse. I took the
first harness off toward the front of the ficm (front of the truck)
and it doesn't blow a fuse anymore. If it was the wiring harness
wouldn't the fuse blow even if the ficm WASN't plugged in?

Do you think the FICM is fried?
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post #2 of 15 Old 06-20-2011, 07:16 PM
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DTS Articles - Recall in Review - Safety Recall 05S34

Not sure if your truck falls into this recall, but here is a link to check out.


E99 F-250 SCLWB Lariat, Born 10/98

7.5" Skyjacker/Icon lift, 37/13.50 20 Toyo M/T's on KMC Rockstars, Bushwacker flares, 03+ lighted towing mirrors, smoked tail lights, new OEM 4" chrome nerf bars, Banks 4" TBE, Superchips tuner, K&N

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post #3 of 15 Old 06-20-2011, 07:38 PM Thread Starter
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My truck was built in April of '04 so it should fall into that recall. Thank you for your response! I was not aware there was a on the harness and ICP sensor. So if I just call up the local dealer and tell them about this they should replace it for free right?

Last edited by cfike; 06-20-2011 at 07:44 PM.
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post #4 of 15 Old 06-20-2011, 07:40 PM Thread Starter
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My truck was built in April of '04 so it should fall into that recall. Thank you for your response! I was not aware there was a on the harness and ICP sensor. So if I just call up the local dealer and tell them about this they should replace it for free right?
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post #5 of 15 Old 06-20-2011, 08:20 PM
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I think it should fall into the recall catagory, we have a 04 F450 that is going in in a few days to have the FICM and harness checked out. Could be low batteries causing the FICM to go.

But in your case to me it sounds like it may be chaffing of the wiring harness.


E99 F-250 SCLWB Lariat, Born 10/98

7.5" Skyjacker/Icon lift, 37/13.50 20 Toyo M/T's on KMC Rockstars, Bushwacker flares, 03+ lighted towing mirrors, smoked tail lights, new OEM 4" chrome nerf bars, Banks 4" TBE, Superchips tuner, K&N

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post #6 of 15 Old 06-20-2011, 08:28 PM
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By the way welcome to the Org., I've been a member myself for only a few months. Lots of good info on here.



E99 F-250 SCLWB Lariat, Born 10/98

7.5" Skyjacker/Icon lift, 37/13.50 20 Toyo M/T's on KMC Rockstars, Bushwacker flares, 03+ lighted towing mirrors, smoked tail lights, new OEM 4" chrome nerf bars, Banks 4" TBE, Superchips tuner, K&N

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post #7 of 15 Old 06-20-2011, 08:38 PM Thread Starter
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Yeah I was almost for sure that it was the harness. But when I unplugged 1 of the 3 plugs out of the FICM the fuse didn't blow anymore. If it was in the harness wouldn't the short in the harness blow the fuse when the FICM is not plugged in? At least that would make sense to me. Maybe I'll just start by having ford replace/inspect the recalls first. Are you having the same problem with the f450?
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post #8 of 15 Old 06-20-2011, 08:43 PM Thread Starter
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Thanks! I've been meaning to join for awhile but haven't got around to it. I've got a lot of info off these forums since I've owned this truck. You defiantly get an education owning one! I barley knew anything about diesel engines until I did the ARP head studs now I feel like I could tackle almost anything lol
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post #9 of 15 Old 06-21-2011, 05:56 PM
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Quote:
Originally Posted by cfike View Post
Yeah I was almost for sure that it was the harness. But when I unplugged 1 of the 3 plugs out of the FICM the fuse didn't blow anymore. If it was in the harness wouldn't the short in the harness blow the fuse when the FICM is not plugged in? At least that would make sense to me. Maybe I'll just start by having ford replace/inspect the recalls first. Are you having the same problem with the f450?
My thoughts regarding your fuse not blowing when unplugged from the FICM is maybe due to not coming into contact with harness and something it may have been rubbing on and causing a short. Have you noticed any wear spots on the harness?

As far as the F450 goes we are having hard starting issues with it which I am guessing is caused by low FICM voltage. I havent done a voltage test on the batteries yet, may do that tomorrow.


E99 F-250 SCLWB Lariat, Born 10/98

7.5" Skyjacker/Icon lift, 37/13.50 20 Toyo M/T's on KMC Rockstars, Bushwacker flares, 03+ lighted towing mirrors, smoked tail lights, new OEM 4" chrome nerf bars, Banks 4" TBE, Superchips tuner, K&N

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post #10 of 15 Old 06-21-2011, 10:16 PM Thread Starter
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There isn't any wear spots I noticed when I checked but that doesn't mean there isn't any. I'm in the process of trying to borrow a code read and I'll see what that says. I'm hoping it's the harness so Ford will pay for it and I don't have to dish the money out for a new FICM because they are not cheap unfortunately.
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