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Just finished this and it works. A couple of notes: The white wire needs to be switched off when not using the wipers because it always carries current. Use a DPDT center-off switch instead of the SPDT he used. Use the second pole to turn on the 12V to the white wire when in either the left or right switch position. Second note, mine also parked in the up position instead of the down. I suspect that on a Willys, you may be able to cross the cable wires under the dash to reverse the action and end up parked in the down position. Other than that, great instructions Grandpajoe. Signed Grandpa Gabe