My 2004 T1N is new to me and this is my first one. I've been trying to track down the reason for a U0423 code and LHM turbo underboost. Today I decided to make sure the ground connections were making good contact, so I cleaned the negative ground connections at the firewall and both negative and positive battery terminals. I was proud of the job I did until I tried starting it. My cluster lights up like normal but it shows start error after it cycles through the light sequence. So I plugged in my innova scanner and it shows a laundry list of transmission codes P0500 generic speed sensor A, U0122 lost communication with vehicle dynamics control module, U0101 generic lost communication with TCM. The thing is it never has had any of these codes nor has it ever shifted incorrectly. The other thing is, I had the battery disconnected for about an hour while I cleaned the connections, so there shouldn't be any codes right? I checked the numbers 16,17,and 18 fuses and they are all good, but I'm not getting power to either side of the number 16 fuse. The only thing I have going for me is I found a Sprinter that a guy was parting out and bought the fuse block, ecm, cluster, ignition, Cruise control stick and some other goodies. WHAT DO I DO? I was planning on going to southern Cal. tomorrow to pick up a two seat bench for it but maybe I should be parting this thing out.