Anyone got a wiper wiring diagram, or can sketch me one, for a universal wiper switch with high,low,park and battery (4 terminals) to a 4 wire fiero wiper motor without pulse, no washer. the washer is wired separately on another switch. I want to wire in a universal switch to run the wiper system and park the wipers on my diablo. i got hi and low to work but never park. A hand drawn drawing would work best, i am not an electrical diagram reader. The wires from the column are gm. Purple, grey, white, & yellow . Please advise.