My wipers would only work on high. we replaced the signal lever which works the wipers too. i did get my mechanic to do it because it was'nt as easy as the parts store said it was. try replaceing the wiper pulse relay board under driver side dashboard
vacuum
A bad relay switch will cause the windshield wipers to not turn off. Replace the relay switch and the windshield wipers should turn off.
The motor needs to be replaced. There is a "switch" in the motor that "parks" the wipers. This happens when current is removed from the motor. Your "switch" in the motor is not allowing this to happen. Replace the motor.
every year
Windshield wipers should be replaced every 6,000 miles. The windshield wipers should be any of the following sizes: 93-01, 94, 95, or 96.
switch them on
There is no button to operate the headlight wipers. The headlights washers and wipers are activated along with the windshield wipers when you use the windshield washer by pulling the wiper switch towards you.
Have you checked to make sure the fuse is good?
check the fuses and relays
The 2002 Chevrolet trailblazer windshield wiper motor should be replaced, when the windshield wipers are skipping. The windshield wiper motor can be located in the engine compartment.
remove the wipers, turn on wiper switch, turn off switch, reinstall wipers @ bottom position torque nuts enough to secure the arm. turn on switch readjust as needed.
You probably have shorted wires inside the combo switch. The assembly will need to be replaced.