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Home >> Chevrolet >> 1987 >> Chevette 2D Hatchback, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Wiper/Washer Systems - Front Rectangular Wiper Motor >> Testing >> Wiper System >> Testing System With Motor Off Car
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Testing System With Motor Off Car

  1. If motor action is intermittent, check for poor solder connections at terminal board, or loose splice joints at brush plate. Check brushes for binding in brush holder or open circuit in armature.
  2. If motor will not shut off, but has normal "LO" and "HI" speed, check for a defective park switch, or grounded Gray lead wire.
  3. If wiper continuously operates on "LO" speed, check for a grounded shunt field coil or grounded Purple wire. If wiper continuously operates on "HI" speed, check for a open circuit in shunt field coil or open Black wire.
  4. If wiper shuts off, but not in park position, check for a defective park switch or dirty contacts. If speed is excessive in "HI" position, check for a defective resistor.
  5. If motor does not run, use test light and check for short at armature. Check commutator hook for poor weld joints. If defective, replace wiper motor.
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