I need to replace the speed control resistor in my 62 wiper motor. Page 12-4 of the ST-12 Fig. 4 shows the resistor as mounted to the wiper switch mechanism. Mine is broken in two pieces. Has anyone ever replaced this resistor and if so where did you get the replacement part? Any help appreciated as I really don't want to send it out again. Rich jcmsp062@aol.com