Hotwire Wiring questions
These are great questions. I'm also running a Hotwire harness for the 6.4L engine management and NAG1 trans.
C) I actually wanted to run the factory push button ignition switch. Chris at Hotwire said that I could not use it because of the sensor system needed (factory key). He said to use a universal key switch.
D) I believe this wire is for the sensor on on the factory brake pedal. You do need this for the NAG1.
E) Possibly a reverse sensor. Again, I think this is a NAG1 thing.
I) I'm running an Autometer GPS speedo. I hope I don't need it.
The instructions suck for my harness but Chris has been helpful an responsive.