it works on every other setting except intermittent (91 240sx btw) it kinda works on intermittent but doesnt go the full sweep it will stop at random places on the windsheild and then go another 3/4 and stop. and ideas as to whats causing the problem? i know its not the motor

i just fixed my wippers.. pretty easy wiring. common place for the wiring to fail is going to be in the drivers side fender. mine stopped working because my tire was rubbing against the harness and wore through about 5 wires. all of which being for the wipers lol