[rosullivan04]

That was a good thought! I just walked all my grounding points around with a negative terminal just in case I missed one. Unfortunately the DME is still being stubborn. What's really odd is that I can pull codes with MHD and even clear codes though my laptop when plugged doesn't light up my ODBII light or allow me to pull codes. I've went through the install a few times, about to try it on another computer.

I feel like I've made progress at least, all my lights come on, I no longer have the amber error on my dash 'though dash and iDrive are always blank', and my water pump randomly starts up when I put my key in. No matter if I put in my key or reinsert it the ignition never fires up, and my dash/iDrive etc. never comes on.

I'm hoping my ISTA+ install is bad and that there's some sort of a reset I have to perform on my DME b/c it was unplugged for over 2 years :/