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What would cause the wipers not to turn off on a 1992 Chevy WT 1500?

- Wiper switch is faulty or stuck in the on position because the internal contact points inside the switch may be damaged or worn.

- Wiper motor relay is stuck in the on position which allows power to flow to the wiper motor constantly.

- Wiring issue such as a short circuit in the wiring, or a loose or corroded connection between the wiper switch, relay, and wiper motor.

- Faulty wiper control module on newer vehicles with computer-controlled wiper systems.