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Testing 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 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 Red lead wire.
  3. If motor will not shut off and has "LO" speed only, check for a grounded shunt field coil or grounded Black wire.
  4. If motor will not shut off and has "HI" speed only, check for an open circuit in shunt field coil or open circuit in Black wire.
  5. If wiper shuts off, but not in park position, check for a defective park switch or dirty contacts.
  6. If speed is excessive in "HI" position, check for a defective resistor.
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