Cannot communicate with any modules except DME and TCM

[andrewwynn]

I put Jumpers in the cap of my wife's 20 pin. I took and posted photos but it might take a miracle to find.

Build date of 8/00 it shouldn't have the 20 pin connector but will have the equivalent wiring so as suspect by the dealer, corrosion or damaged wire is likely.

I would first locate EWS box and disconnect and clean the connection. Then if nothing obvious open up the E box and "exercise" the plugs to the DME (remove, clean, replace)