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Old 08-16-2006, 12:14 AM
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Shop Wiring Diagram for GM Wiper Switch

Elder Rodder,

Pete's effort was solid - it gets the basic functions OFF LO HI to a wiper motor such as the excellent unit you bought from Newport.

If your Buick switch tests out like Pete's -
you have two wires (on Pete's the violet and gray) that are:

not connected to ground for OFF
both connected to ground wire for LO
one not connected, and one is connected to ground for HI

Then Pete's circuit will work well. I took the liberty of drawing the circuit out complete with the proper fuses - thank you Pete for the inspiration.

My previous "black box" made the intermittent wiper variable delay and washer functions operable. It was very complex.

This circuit of Pete's is simple.

Jon P
Attached Files
File Type: pdf GM Wiper Switch.pdf (24.3 KB, 854 views)

Last edited by ElegantInventor; 08-16-2006 at 12:20 AM.