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Home >> Sterling >> 1987 >> 825 SL, 2.5 B >> Repair and Diagnosis >> Accessories & Equipment >> Wiper/Washer Systems >> Testing >> Front Wiper Motor

Front Wiper Motor

  1. Remove cowl air scoop and grille. Unbolt motor to gain access to connector. Remove wiring connector and wiper motor linkage from motor.
  2. Test low speed operation by checking for continuity between relay terminals "C" and "E" with battery voltage applied to terminals "A" and "B". If no continuity is present, replace relay. See Fig 1 . If relay is okay, apply battery voltage to Red/Light Green (positive), and Brown/Light Green wires at wiper motor terminal connector.
  3. Test high speed operation by checking for continuity between relay terminals "C" and "D" with no connections to other terminals. If no continuity is present, replace relay. If relay is okay, apply battery voltage to Brown/Light Green (negative) and Red/Light Green (positive) terminals at wiper motor terminal connector.
  4. To test high speed on Sterling, apply battery voltage to Blue/Light Green (positive), and Brown/Light Green (negative) wires at terminal connector.
Fig 1: Sterling Relay Connector Locations
G68202