the 58-9 electric wiper unit was a transition to the 60-66, unlike the 55-57 unit - pic here, and it does use an electrical dash switch .... no idea about wiring, but it may be in the 58 shop manual

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot