i think my windshield wipers are about to make the trip up to that bid windshield in the sky soon. earlier today, i tried to turn them on and got a humming noise from the dash. ive got rain-x, so i just drove home without them, but had it been a heavy rain i wouldnt have been able to see. anyway, when i got home, i checked the fuse, and tried it again. it hummed for half a second and then worked. they havent done that again, but im worried that they will when i need em. anyway, ive heard that 88-98 trucks have issues with the wiper motors and circuitry. is this an early symptom of problems to come? how hard is it to replace all the innards?