Variable Wiper Alternative

I am assuming the wiper switch is for your 65 Barracuda? My 66 has variable speed too, and is likely similar. I looked at the factory manual and discovered a few things. The speed is controlled with a variable resistor on the motor field. The park system seems special (odd). It has an external cam and spring mechanism on the external arm crank linkage of the motor. It is not clear, but it might depress a MicroSwitch in gear head It actually reverses the motor direction for park. I suggest looking at the manual and go over the particular problems There are diagnostics and service procedures.

It is such an odd system, I doubt it is possible to retrofit a standard intermittent control.

Switches can be repaired if it is a matter of loose rivet connections on terminals or other adjustments. Careful cleaning and soldering with high content silver solder, using a Weller induction (transformer) iron works for me.