How many speeds...1 or 2 does the windshield wiper motor have. My 59 544 that I had 40+ years ago had 2 speeds, is my 60 just having a problem?? The wiper speed is slow, but there doesn't seem to be a 2nd position on the switch. The switch appears to be original, but there is only ehough wiring to it to provide 1 speed. After much investigation under the dash I can't find any wiring that had been deleted? Ideas? Solutions?