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Home >> Cadillac >> 2008 >> XLR Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Wiper/Washer Systems >> Wiper System & Washer System >> Diagnostic Information and Procedures >> Windshield Wiper System Malfunction >> Component Testing >> Multifunction Switch
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Multifunction Switch

  1. With the ignition OFF, disconnect the C1 harness connector at the turn signal/multifunction switch.
  2. Test the resistance between terminals H and L. 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 turn signal/multifunction switch.
  3. Test for infinite resistance between terminals H and K while rotating the wiper switch to MIST, each DELAY and LOW speed positions.
    • If the less than infinite, replace the turn signal/multifunction switch.
  4. Test for less than 5 ohms of resistance with the wiper switch in the High speed position.
    • If greater than 5 ohms, replace the turn signal/multifunction switch.
  5. Test for infinite resistance between terminals H and J while rotating the wiper switch to MIST, each DELAY and LOW speed positions.
    • If less than infinite, replace the turn signal/multifunction switch.
  6. Test for less than 5 ohms of resistance while pressing the WASHER switch.
    • If greater than 5 ohms, replace the turn signal/multifunction 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 voltage before replacing the switch.
Wiper Switch Values

Switch Position Resistance
Off Infinite
Mist 300-364 Ω
Delay 1 3.48K-4.25K Ω
Delay 2 2.52K-3.08K Ω
Delay 3 1.78K-2.18K Ω
Delay 4 1.17K-1.44K Ω
Delay 5 697-851 Ω
Low 300-364 Ω