Check for B+ at the wiper fuse terminal, then check for voltage at the wiper motor. If your getting B+ at both of these locations then disconnect the electrical connector on the motor of wiper motor and jump the motor directly to the battery. If the wiper doesn't work you need a new motor. If B+ was not found at any of the other locations you have to back probe the wire to find the open.
Furthermore , you have to test the switch and the relay.
Use the shop manual to do this. Good luck
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