I am trying to get my wiper motor to work.
I know the switch is a negative ground. I have three plugs on the motor. Each one has 12V at all times. Which wires get grounded to activate the motor?

This may help it took me a while to get my head around how to wire these

Or this

If I put the 12v to the right lead, I have 12v on the other two leads. Im guessing the winding are shorted together.

And you will when the #1 yellow ignition switch is turned on there should be power everywhere
Then the wiper switch will complete circuit to ground, either on the #1 blue wire for high speed
or the #2 light blue and #1blue both for low speed