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Home >> GMC >> 1966 >> I1500 Automatic Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Windshield Wipers - 1 & 2-Speed Electric -- Square Motor >> Testing & Trouble Shooting >> 2-Speed Wiper (On Car) >> Speed Normal In Low, But Too Fast In High

Speed Normal In Low, But Too Fast In High

Terminal board resistor may be open. Remove from car to test terminal board.