I'm new to diesel engines and just learning these things after my purchase of a used 2004 F-250 6.0…
Got a question for all the 6.0 diesel tech gods on here (I say that with repeat, I know nothing about diesel engines).
So recently truck started running rough, got a code of P0265 (Cylndr 2 Injector Circuit High)…
Took it to a mechanic for a look see, they told me that the wiring that comes out of the FICM for ignition is in bad repair and cracked which is causing the problem.
They recommended a new harness for it.
I waited to do any repairs since I was potentially going to trade it in.
Next day I tried to start it but no-go, cranks but docent turn over, no smoke from exhaust either.
After reading some post here I realized that the FICM probably is the main culprit, and the harness needs to be replaced to get it back up and running.

Now main question…
After reading a very good post about the FICM and Fords Inductive heating by using higher volts, could this inductive heating have caused the wire harness to crack and deteriorate at a much faster rate than normal? Just wondering if the bad wire harness is a by product from the inductive heating or maybe something more going on in the electrical on that engine?

Thx
Ben

 

While the inductive heating does pull more current while it's heating, the truck is now 10 years old and the harness/FICM placement near the hot turbo (and rough handling during previous repairs) probably has as much or more to do with the deterioration as the FICM strategy.

 

So the extra draw is fairly low in respect to wire durability, just wondering since I'm replacing that harness, and didn't know if it had any effect on the FICM wiring, and or other wiring.

Thanks

 

Rusty pretty much hit the nail on the head. The 03/04 harnesses were "bad" to start with anyway and replacement would by far be your best repair. They're not hard to replace at all and you'd be money ahead to do so whether you sell the truck or not.

 

Thats what I'm figuring, pull the old crap out, I have a post on here asking what the FICM harness is called got a reply with a link to the part (awesome!)… Still kind of wondering if I should tackle the job or not???

Thx

 

A tip take a picture of the harness for proper placement/routeing of the harness.
As stated 03/04 were routed poorly a lot of pinch points and rub thru spots.
05 and up had a little better routeing.

 

Good idea… will do this, probably some video too just in case.

Does anyone know if this harness is just a matter of just disconnecting connectors and plugging in the new harness, or am I looking at doing soldering etc…as well???

 

When you get to a pinch point or abrasive area you might also put some wire loom shielding there.