We’re back in action, working on our (Class F winning!) 1962 Ranchero LeMons racer. We’re diving into a huge to-do list (more on that later), but could use a hand setting up some simple wiring for a newly acquired electric wiper motor. This is a two-speed unit, wired as you see above. Click here for a full-resolution version of the circuit diagram. Unfortunately, all we have is the motor and immediately attached wiring, but no factory switches or squirter stuff. Based on what you see above, how should we wire a simple single “on” switch to run in low? It’s not clear to me what’s actual power and what are weird loop-backs to help with the squirter circuit. Bonus points: how to wire a triple-throw switch for high/low/off operation? Just as a bonus, here’s the latest on the car: last weekend we took care of a number of leftovers from the first race: finally painting the whole cage, changing the oil, cleaning up janky gauge wiring, etc. The biggest upgrade was installing a wideband O2 sensor for future tuning and carb debugging utility. Still to-do are swapping in a non-fogged windshield, the two-barrel carb, electronic ignition and repairing the broken shackle mount (more on that in a different post). According to The Internet, this motor will bolt up right in place of our dead vacuum motor and the linkages all just work.