Hello from NC ladies and gents. Been lurking here off and on and don't think I have ever posted up.

I have a 2009 Honda Rubicon. I was having a shifting problem with the Hondamatic. Determined it to be a loose connection on the gray 21 pin connector at the control unit (ECM/PCM). I located a source for the connector and replaced it. This improved the connectors feel greatly, HOWEVER, even though I thought I was careful transferring the wires/pins from the old connector to the new connector, I must have crossed up a couple wires because now the gear position display (switch is new) no longer works. It worked fine before the connector change.

No matter where I have looked, I cannot find a "pin out" for the ECM connectors. The factory service manual does not show it and I have a connection at a dealer and their service techs don't have the pin out either! I was a Chrysler/Plymouth/ Dodge tech in another life and cant imagine th factory not providing pin out diagrams for diagnostics!

I am at a loss unless I either replace the harness, OR find someone that can take multiple photos of the wires going into the gray connector so I can compare mine.

Any help or advice would be appreciated. I will also post up the location I found the connectors if that is allowed, since it seems that they fail with some age.

connector source:

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