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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 >> No Delay In Pulse Mode

No Delay In Pulse Mode

  1. Disconnect wiper switch connector. See Figure . Turn wiper switch to DELAY position. Connect ohmmeter between Gray and White wire terminals of wiper switch. If reading is less than 670 ohms or greater than 690 ohms, replace wiper switch.
  2. If reading is 670-690 ohms, move wiper switch through pulse range to maximum delay position. If readings do not increase in steps to about 450 k/ohms, replace wiper switch. If readings increase in steps to about 450 k/ohms, check for open in Gray or White wire between wiper switch and wiper motor. If wires are okay, replace wiper switch.