lb7 swap need help

Lil LB7

New member
Feb 9, 2015
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ontario canada
hi guys im in the middle of finishing my 1500 rcsb lb7 swap and the electrical is kicking my butt. Im getting a p0612 code and cant figure it out. I heard there is a ign relay mod to fix this. If anyone knows about it help would be appreciated
 

THEFERMANATOR

LEGALLY INSANE
Feb 16, 2009
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ZEPHYRHILLS, FL
That code is because the ignition 1 relay for a gasser is triggered by the ignition switch, in a diesel it is triggered by the ECM to power the FICM. You either have to use a diesel fuse panel, or you can install a separate relay outside the current fuse panel for the ignition 1 relay, and set it up to be triggered by the ECM.
 

TheBac

Why do I keep doing this?
Staff member
Apr 19, 2008
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Mid Michigan
Yeah, Ferm meant the underhood panel.

BTW, a huge "thank you" for the mount pics. You helped me get over a roadblock on my half ton.
 

THEFERMANATOR

LEGALLY INSANE
Feb 16, 2009
3,890
43
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ZEPHYRHILLS, FL
Yes, the underhood fuse panel. I know Eric installed a remote mount relay on them so he could retain the burb fuse panel and keep the code away.