Bill and John
Key 'ON' wipers off the OP is getting enough ground now, back through the wiper mechanism, to trip the relay and make the lights stay 'ON'. That is with wipers OFF.
Looks to me like the two diodes will allow the same ground path that he's having a problem with now.. That's through the wiper motor not the wiper switch.
Pretty sure (not positive) the terminals for wiper speeds are only a small portion of the ground needed for the wiper motor to run.
Clay
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