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Component Testing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the X1 harness connector at the S48A Multifunction Switch - Instrument Panel.
  2. Test for infinite resistance between the signal circuit terminal 2 and the ground terminal 8 with the switch in the open position.
    • If less than infinite resistance 

      Replace the S48A Multifunction Switch - Instrument Panel.

    • Go to next step: If infinite resistance 
  3. Test for less than 2 Ω between the signal terminal 2 and the ground terminal 8 with the switch in the closed position.
    • If 2 Ω or greater 

      Replace the S48A Multifunction Switch - Instrument Panel.

    • Go to next step: If less than 2 Ω 
  4. All OK.
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