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Component Testing

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

Liftgate Latch

  1. Ignition OFF, disconnect the harness connector at the M30 Liftgate Latch.
  2. Install a 10 A fused jumper wire between the control terminal 1 and 12 V. Install a jumper wire between the ground terminal 2 and ground.
  3. Verify the M30 Liftgate Latch activates
    • If the M30 Liftgate Latch does not activate. 

      Replace the M30 Liftgate Latch.

    • Go to next step: If the M30 Liftgate Latch does activate. 
  4. All OK

Trunk Release Switch

  1. Ignition OFF, disconnect the harness connector at the S46 Liftgate Handle Switch.
  2. Test for infinite resistance between the signal terminal 1 and the ground terminal 3 with the switch in the open position.
    • If less than infinite resistance 

      Replace the S46 Liftgate Handle Switch.

    • Go to next step: If infinite resistance 
  3. Test for less than 3 Ω between the signal terminal 1 and the ground terminal 3 with the switch in the closed position.
    • If 3 Ω or greater 

      Replace the S46 Liftgate Handle Switch.

    • Go to next step: If less than 3 Ω 
  4. All OK
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