Those diagrams are j u st what I need. I'm thinking that when I pull. The harness down I to check voltages things a re fine. Put things back and they are not. I may pull the wiring harness this week and have a looky see. I'm thinking there is a worn spot on the harness that is shorting out. Sound like fun?

 

one of the test has you ohm out each wire back to the pcm. As I recall they should be less then 5 ohms end to end. Also as you know you can check them for short to ground and each other. The voltages your working with wouldn't take much. Good luck.

 

Thank you so much for the help. I really appreciate it.
Dale

 

Well I pulled the wiring harness today and those pin diagrams helped tremendously. I fixed the B2s1 problem. found a broken wire, just one..up by the cylinder head. small hole, must have been a bolt or something. ... go figure. Patched and repaired it and put it back in and fixed the problem. however a new code came up with B1s2 heater circuit. Evidently, I didn't get it put together so well or there is another wire. I kind of expected b1s1 error as it was really tight in that area. It does run a lot better. Letting it cool down now so I can get underneath again and hope it's a quick fix.
Thanks again for your help.
Dale

 

Just traveled to Grand Haven and truck ran great. Almost 17 mpg. That's amazing for this truck.
thanks again for all the help. couldn't have done it without the pin diagrams.
Dale