Wiper Motor Voltage

[bigblueh20]

Thank you sir. I will give this a look tomorrow. 

This is what I would expect for readings, all read to the yellow  / negative wire:

With the wiper switch ON read 12 volts on the pink / hot wire.

With the wiper switch OFF read 12 volts on the brown / park wire.

The PARK switch contacts are internal in the wiper. They are closed until the motor makes a revolution to the park position and then they open and stop the motor.

These readings are best taken while the wires are connected to the wiper as an open circuit reading can be misleading if you have poor ground connections or bad switch contacts.

I would be looking at a bad ground at the console end, bad switch contacts or corrosion at the switch terminals.

Capt. George