What is a ignition relay circuit? Is there an unpowered circuit in my truck? Don't have any blown fuses, Kinda makes ya go Hmmmmmmmm.

It deals with the IGNITION 1 circuit according to ALLDATA. I sent you a flow chart on it last week, did you get it? If not I can send it again. I would post it, but it would probably be removed as it is copyrighted material.

Thanks fermanator,
You got me going in the right direction.:)

getting my azz kicked over here, have the alldata info but it says dose engine start? if so go to diagnostics, well it dose start so now what? Dose anyone know what this circuit is or what it dose? The diesel fuse panel dosn't throw a code so it must be a wiring issue, You must run the SUV fuse box to have power to all the optoins. I spent the last few days tracing out the wiring between the two panels, but knowing what the circuit is would help greatly.
Thanks guys
Eric

O.K. I found it it was the PCM/EDU relay that I had to rewire diferently to get the Escalade gasser fuse box to jive with the Duramax ECU. I'll cover it in the video
Eric

I have an 05 Duramax suburban that has this dtc. I am curious how to get rid of it.

I have an 05 Duramax suburban that has this dtc. I am curious how to get rid of it.

The relay that supplies power to the FICM and ECM is triggered by the ECM to turn on and off in a DURAMAX. In a gasser that relay is powered by the ignition switch to turn on and off. You have to go in and change it over so that it uses the ECM trigger to activate the relay instead of the ignition switch.