I've always used the KISS principle. Run the engine- - - -use a gauge on the pump to see which port develops a vacuum. Connect that port to the wiper motor control. Connect the other port to the intake. Think up something else to worry about.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!