2011 International Prostar wiper issue

Diagram is in two pieces. Looks like the wiper speed is controlled by the Body Controller. See lower left of diagram. Pull apart each connector from the turn signal switch to the wiper motor and make sure there is no corrosion.

 

You need to check three wires between your wiper switch connector and the body controller. Check wire B82A at the wiper connector cavity 8 which becomes A82A at the body controller J3, cavity A9. Next is B82B at wiper cavity 11, to A82B at J3 cavity A10. Last check, B82C at the wiper cavity 5 which becomes A82C at J3 cavity A11. Make sure these wires are good and not open or shorted to ground. All three wires are grey in colour and 18 gauge in size. The cavity number is molded into the connectors with very tiny numbers and "J3" is molded into the body controller. J3 is also the red coloured connector.