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Discussion Starter #1
I've got 2 Wiper Harnesses that are identical except one has an extra Green jumper wire.

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I don't know if that extra Green jumper is needed.
And I certainly don't know which contacts to connect these wires to on the 3-Position Toggle Switch.

I downloaded this description of the contacts on the Wiper Toggle Switch, but I haven't found a good description of the wiring that attaches to it.
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The Red Wire coming from the Fuse Box was attached to contact 34.
I'm not certain that that's even correct.

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Any help would be greatly appreciated.

Thanks,
Jeff
 

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Jeff, guessing the extra wire is a owner only addition. Pretty common.
I notice the switch has a "wiper" icon. OEM switch was a simple two post on/ off switch and no icon. Wiper motor was one speed.
Cheers, Jon
 

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If you want to use the 3 position switch as a simple on/off then the switch diagram in the above link will enable you to choose a pair of terminals. You have several choices if you do that.
 

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Discussion Starter #5
OK. Everything is hooked up and working.

That extra jumper wire is required. (BTW, there was a Bring A Trailer auction of a 67 Duetto awhile back that included a picture of that jumper in the tear down photos).

I drew up a wiring diagram of the completed wiring (with details that the Alfa Wiring Diagram didn't include).
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