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A very detailed wiring diagram analysis video and part of our wiring diagram and automotive electronic series here on this channel here well go into details on the newer computer controlled . Left front window up dark blue at motor inside drivers door left front window down brown at motor inside drivers door right front window up blue white harness in drivers kick panel from driver door right front window down tan harness in drivers kick panel from driver door wiring information 1986 chevy van. Wiring diagrams description these diagrams use a new format the diagram is surrounded by a alpha numeric loaction grid all the wires at the connectors have alpha numeric addresses showing where the other end of the wire is located ac cording to the grid the connectors are shown with end on views with