The speed of the Mighty Wiper motor is determined by the switch used to control it. There is no commercially available 2 speed switch that will control it at a lower speed. We have had them made in the past but have never been able to sell enough to make it viable for a manufacturer to continue producing them.  As an alternative, you can wire in a delay switch as detailed below.

The delay switch is not stocked by us, but can be purchased from JC Whitney (www.jcwhitney.com).  They have two delay switches, part numbers 12ZX2370A and 81ZX1784P and can be seen here.

Please note that the Mighty Wiper cannot be controlled by any General Motors column-mounted wiper switches!    This is due to the fact that GM switches control the wiper motor via the ground wire and our system must be controlled by switching the positive wire as per the wiring diagram shown below.