Hi there, new to the forum. Purchased the same Kascar wire harness and will be cleaning the existing terminals and installing the Kascar over the weekend. I have the flickering lights and gage issues to say the least.
My biggest problem is cold hard start. Did replace the glow plugs, put a block heater, etc. and still won't fire up right away!! Once I deal with the grounding, I'll then proceed to disconnect the battery and install a replacement controller. (I think my Nartron white label smart start system is still ok) I'm hoping these couple of quick and easy steps can help remedy the problem. Shouldn't have these issues firing up when the weather is only 45 degrees.
Anybody have some input regarding my plan? Other suggestions? P.S. gonna replace the thermostat, seal, flow control switch, and radiator cap shortly after.... simple jobs turn into projects man! (1990 M99