Got a 1999 GMC Suburban with a 5.7L Vortec, 4x4. Front windshield wipers sometimes make a electronic sound.?

Question

It doesnt always happen, but occasionally, I cant get the wipers to work, it doesnt matter what wiper mode I select, ie: windshield wash, mist, or the normal delay, or low or high speed, it still gives a high pitched tone, that sounds nothing like an electric motor. But rather like a circuit board, such as a failing transistor? Then if I wait about a minute of not trying to get the wipers to move, and I try them again, all modes of wiper activity work. Any ideas? I dont think its the switches. Thanks

Answer 1

look at the wiper motor and see if it has a cover with 4 torx screws, if so theres a circuit board underneath that controls your wipers