alldodge I hope you are still on this forum. This is much appreciated. I just spent a lot of hours tracing wires and getting confused. Not a mechanic or technician, but can read a meter for simple continuity and voltage checks. Had an issue where the ignition circuit blew fuse under helm. the fuel pump would not run in the system either with start or while running with oil sensor. If I plugged up the circuit I would blow fuse again. Now I am at the point that I can run if the diode and TKS actuator is not connected. The diode has failed open. So now I have to see why? From your drawing it looks like I should start at the temp switch. And advice from you or others will be welcome. 2006 5.0L TKS Alpha.