Fuses: I'll have to review the Haynes maual I have to see what circuit the MOT is on so I can check the fuse, although I have not come across a blown fuse when I've check in the past.
Voltage: I'll need to pick up a multi-meter and check the voltage across the pins for the MOT connector - any advice on doing this?
Carbon Deposits - how do I check on "carbon deposits clogging past the EGR pipe into the engine cavity"? Also, what do you mean "Pm'd some links concerning carbon build-up"? I'm sorry I'm not more up to date with terms, what is "Pm'd"?
Codes: I can pull all the codes with the OBDII at Autozone - is that adequate? What do you mean "SDS may have to be done"
Again, I appreciate your input and apologize for being less than literate about Pm'd and SDS