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Home >> Chevrolet >> 1994 >> Astro Van Passenger Extended, 4.3 Z >> Repair and Diagnosis >> Accessories & Equipment >> Wiper/Washer Systems >> Testing >> Front System >> Wipers Operate In Low Speed, But Not High

Wipers Operate In Low Speed, But Not High

  1. Disconnect wiper motor connector. Turn ignition switch to accessory position. Turn wiper switch to HI position. Connect test light between ground and Purple wire terminal of wiper motor connector. If test light glows, repair or replace wiper motor.
  2. If test light does not glow, connect test light between ground and Purple wire terminal of wiper switch connector. See Figure . If test light does not glow, replace wiper switch. If test light glows, repair open in Purple wire between wiper switch and wiper motor.