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I recently changed my ECM to a reman after my other one crapped out on me and I never had any check engine lights and have been driving the truck for 2 months now with no issue. I checked for codes the other day for the hell of it and this one was on there. SKIM Key not programmed. I drive this...

Can someone please explain to me how to wire a OBDII directly to my ECM and battery? I have got my programming issue narrowed down to a wiring.ground issue and do not know what else to do. Have talked to MADS, Bob and the dealer I got my smarty from. Bought a new ECM, checked batteries, pulled...