Here's my plan for the wiper wiring
#1 Find out which pins on the plug go to ground, 12V, the slow, & fast 'power.'
#2 Find out if the intermittent pin puts out 12V or a pulse, or what? If it's a pulse ( my thinking), you'll probably need 12V on the slow pin to keep the motor going one cycle.
#3 If you need to, you can use some big diodes on the intermittent hookup to 'fool' the motor to think it's in slow speed. I've got no ligic on this- have to figure it out later, after I get the car back.
L28/Mustang power steering getting finished Tuesday!