From 1979-on the wiper wiring colors are the same. The dash switch will have an extra wire for the panel bulb that you don't need on the column. The other gotcha is there are two gray wires on 1979-1983 dash wiper plugs... The extra gray panel illumination wire can be cut off and heatshrink installed on the end...
I wrote up the wring for the wiper/washer/pulse system in the electrical group.
http://forum.73-87chevytrucks.com/smforum/index.php?topic=32195.0The harmonica plug with the Turn, Hazard, Horn, Brake, and "Key inserted" wiring is the same part #12004147 and pinout matches on the 1979-1986 CK trucks... I haven't checked the 87-91 RV series trucks or any earlier than 1979.
The top is snipped from the 1984 wiring manual Bottom is from the 1979 wiring manual. The Key-inserted buzzer switch is not shown on the 1979 wiring but I believe it's there.