Thank goodnes for rainex ......

Windshield wipers quit over time; started sometimes working, sometimes not .... now not at all though the spray function still works ... fuse ok; horn n' headlights fine.
Direct wire to wiper motor from battery ... wipers work. Not sure how to test wiper switch with ohmmeter and can't find wiring diagram so far and no mention in Haynes manual.

Key on; power to wiper switch plug block on bottom right only (double yellow wires) seems there should be power to all so whatever position I chose (intermittent, reg, high) the wipers respond.
Is top center (red) main power from battery?(no power now)
Is there a relay I need to find?

Thanks in advance for the help ..... this isn't a good time in the pacific northwest to not have wipers.
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steve m