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Does anyone have a wiring diagram or can explain where each wire goes out of the tranmission for a 1993 2500 6.5L td 4x4 4L80E. There is about 11 wires I believe.
 

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Here is what I found in my manuals for a 94 hummer with the same tranny - should give you an idea. I suspect the tranny computers are the same. (This is for the inputs to the trans computer.) I'll look some more for the actual tranny diagrams.

1st connector:
Orange - Mode A
Dark Blue - Mode B
Purple - Mode C
Yellow - Shift Solenoid B
Light Green - Shift Solenoid A
White - Diagnostics Request
Orange - Battery
Light Blue - A/C Request
Purple - Brake Switch
Tan - TCC Solenoid
Brown - Check Trans LP
Orange - Serial Data
Red - Toss Hi
Dark Green - Toss Lo

2nd Connector
Black - Ground
Black - Ground
Tan - Sensor Ground
Gray - +5 Volt Ref TPS
Light Blue - Force Motor Feedback
Light Green - Ignition (Hot & Run)
Dark Blue - Tiss Lo
Gray - Tiss Hi
White - Diesel RPM
Tan - TPS Lo
Dark Blue - TPS Hi
Brown - Trans Temp
Orange - Baro
Red - Force Motor Hi
 
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