wai wpm380 wiper motor

Hello everyone, I am installing new style wiper motor wpm380 2 speed , bolts up fine has 4 prong plug like factory, no directions of course , has anyone hooked one of these up? old wiper motor was missing, factory manual show a ballast resistor mounted and wired in harness for low speed operation. is the ballast needed for new motor? . called year one , no info, called wai, haven't heard back, advance ,parts geek no info available. just don't want to let the smoke out. Thanks for any info