Hi, new to the forums here. been helping a friend diagnose a transmission problem (code p0882) TCM Power Input Signal Low, is present and active. I have looked through multiple places for a proper wire diagram but have not found what i need. I believe there is a broken wire somewhere between the trans relay and the transmission itself. i have taken the C4 connector (BLK/GRN) off the PCM and applied fused 12v power to pin # 18. when i apply power i can hear the relay click (I have also tried multiple relays. when fused 12v power is supplied to pin #18 on c4 PCM connector i am not reading any voltage to pin #10 (or any other pin, i checked them all) on the truck side of the trans harness . this leads me to believe there is a broken wire somewhere in the harness. the Info that i have been reading talks about a junction connector (C130) which i have not been able to find a diagram for or any definitive location as to where it is. any help would be greatly appreciated. i do own a scan tool (launch x431 pro mini) but it has not been much help in this diagnosis. i can send a link of the info i have been using via other means as i am new here and not sure on the rules of posting links.

thanks in advance -Dan

 

How's your battery? Alternator charging properly? Think I would start with having both tested.

You have already verified the wiring, so, if the batt/etc checks out good, kinda points to a PCM issue......