Quick question: What controls the wiper motor speeds. My intermittent works good, the slow is acceptably slow, but fast seems to be as slow as, or maybe a little slower than, the slow speed. Does the column switch actually act like a switch & control the juice supplied to the motor? Or is this more likely a motor problem? The only relay that I've found listed is for the intermittents? Is there another one I haven't found? Thanx in advance.

tw