Hi im new to this forum and been reading a lot about trucks like mine and need help . I have a similar problem 1998 LMTV m1078 3116 pulling a code d1-6600 d2-4212 d3-6927 I found wires that where rubbing against steering wheel bar. I did try to fix that issue But still can’t get my truck to drive won’t go into gear no communication to Transmission so I thought I did a poorly job crimping my wires and tape. Would that problem burn my ECU ? Also noticed that my k34 relay gets to hot by touching it, ECU was on the worm end by touching it is that normal? Also I changed my A solenoid and internal wire harness in transmission , I check my grounds to Frame and polarity protection device I had 12v and 24v and I have 12v and 24v at PDP. now is it normal for duel voltage regular light jump from 12v to 24v back and forth? Thanks
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