Thanks in advance for the replies...


I have 13000 miles on a 2004 LB7. Last week, the check engine light came on. I took it to the dealer, and they had to replace a wiring harness (pn97360796) and replace the fuel injector control module. (pn97720663.) The truck seems ok now. Has anyone heard of this happening? And could the juice have caused it? I am hesitant to reinstall the Juice until I know for sure. Thanks Guys!


Dave

You'd be the first if so . Many Juiced before you haven't seen a problem with the FICM. There is only electronics that up the voltage to the Injectors in that tin box that are cooled with fuel circulation.


Did you get it excessively wet ?


Mac

It did not get wet that I am aware of.. I clean the engine by hand, and never use a hose....


Dave

what codes did you have? I find it unlikely that both of them were bad unless it had some green build up in the connections

Hi Eric..


The tech reported code U2104, and then "lead to open in circuits 2362, 2361, 2832".

I have replaced 4 FICM's on 04's never on 03 or below. reason for replacement 1 bank of injector shut down, internal short in the FICM.


never had to replace any harness.

I have seen the harness conection from the injector throught the valve cover shorted never a ficm.

Thanks for the replies. Any help on what the code is?

Just received call from GMC service writer. Service has ordered a new engine wiring harness for our 04 2500HD CC D/A. 36,000 MILES.

Codes: P00202; P2149.

I have also seen the wire harness rub through near the FICM, but never a bad FICM.