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Message: [QUOTE="cbuttre835, post: 509209, member: 1190"] I'd like to see a diagram of what happens in the trans when "shift solenoid 1" is grounded, etc. There are plenty of wiring diagrams available but I don't know what to expect behavior-wise from the PCM or transmission. Baumann engineering has some info and other forums have links to various TSBs and tech documents but I still can't find enough info to troubleshoot with (at least the way I like to troubleshoot, which invovles understanding how stuff works to start with, then breaking the system down into testable components) I don't know enough about the sequence of operation of the trans to know if the PCM is sending valid commands and its disobeying, or if the PCM / harness ain't working right and its properly obeying bad info. [/QUOTE]

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