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GMC
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1966
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I1500 Automatic Trans
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Repair and Diagnosis (Single Page)
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Accessories & Equipment
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Wiper/Washer Systems
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Windshield Wipers - 1 & 2-Speed Electric -- Square Motor
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Testing & Trouble Shooting
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1-Speed Wiper (Off Car)
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Wiper Runs Slow & Vibrates
Wiper Runs Slow & Vibrates
If current draw is 7-9 amperes check for gear train binding or shorted armature.