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Home >> Saturn >> 2007 >> Sky Base, Automatic >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wipers System And Washer System >> Diagnostic Information and Procedures >> Windshield Wiper Washer System Malfunction >> Component Testing

Component Testing

Windshield Wiper/Washer Switch

  1. With the ignition OFF, disconnect the harness connector at the windshield wiper/washer switch.
  2. Test the resistance between terminals D and E. Rotate the wiper switch and compare the resistance readings to the values in the Windshield Wiper Switch Values table below for MIST, each DELAY and LOW speed.
    • If the resistance is not within the specified range, replace the windshield wiper/washer switch.
  3. Test for infinite resistance with the wiper switch in the High speed position.
    • If less than infinite ohms, replace the windshield wiper/washer switch.
  4. Test for infinite resistance between terminals D and C while rotating the wiper switch to MIST, each DELAY and LOW speed positions.
    • If the less than infinite, replace the windshield wiper/washer switch.
  5. Test for less than 5 ohms of resistance with the wiper switch in the High speed position.
    • If greater than 5 ohm, replace the windshield wiper/washer switch.
  6. Test for infinite resistance between terminals D and B while rotating the wiper switch to MIST, each DELAY and LOW speed positions.
    • If less than infinite, replace the windshield wiper/washer switch.
  7. Test for less than 5 ohm of resistance while pressing the WASHER switch.
    • If greater than 5 ohm, replace the windshield wiper/washer switch.
IMPORTANT: If the switch tests open in any switch position other than Off, test the wiper/washer switch signal circuits for a short to ground before replacing the switch.
Wiper Switch Values

Switch Position Resistance
Off Infinite
Mist 1604-1960 Ω
Delay 1 8.49K-10.37K Ω
Delay 2 6.14K-7.50K Ω
Delay 3 4.45K-5.44K Ω
Delay 4 3.19K-3.89K Ω
Delay 5 2.28K-2.78K Ω
Low 1604-1960 Ω

Relay Test

  1. Ignition OFF, remove the relay.
  2. Test for 70-110 ohms of resistance between terminals 85 and 86.
    • If the resistance is not within the specified range, replace the relay.
  3. Test for infinite resistance between the following terminals:
    • 30 and 86
    • 30 and 87
    • 30 and 85
    • 85 and 87
    • If less than infinite, replace the relay.
  4. Test for less than 2.0 ohms of resistance between terminal 30 and 87A.
    • If greater than 2.0 ohms, replace the relay.
  5. Install a 20 amp fused jumper wire between relay terminal 85 and 12 volts. Install a jumper wire between relay terminal 86 and ground. Test for less than 2.0 ohms of resistance between terminals 30 and 87.
    • If greater than 2.0 ohms, replace the relay.

Windshield Wiper Motor Dynamic Test

  1. Ignition OFF, disconnect the harness connector at the windshield wiper motor.
  2. Install a 25-amp fused jumper wire between the control terminal D and 12 volts. Install a jumper wire between the ground terminal A and ground.
  3. The wiper motor should be in low speed mode.
    • If the wiper motor is not in the low speed mode replace the motor.
  4. Install a 25-amp fused jumper wire between the control terminal C and 12 volts. Install a jumper wire between the ground terminal A and ground.
  5. The wiper motor should be in the high speed mode.
    • If the wiper motor is not in the high speed mode replace the motor.
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