Scroll down to WW (Wiper & Washer), and look at page WW-37 and WW-39 (WW-39 has it all one 1 page, I'd use that).
The washer pump system is a simple system. Ignition switched fuse, mechanical switch (front vs rear reverses the polarity within the combination switch) and washer pump.
I trust you'll be able to follow it through. Use a voltmeter, disconnect the combination switch and:
- make sure the harness connector to switch has ignition power at pin #14, ground at pin #12
Also disconnect the washer pump and:
- make sure there's continuity between the washer pump and switch
Finally, verify the actual switch is operating correctly:
- make sure the switch internal contacts work per WW-31 when set to front wash , rear wash