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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.
  1. Ignition OFF, disconnect the harness connector at the S39 Ignition Switch.
  2. Using the Resistance Test below, verify the resistance between the terminals listed below match for each S39 Ignition Switch position.
    • If any reading is other than specified 

      Replace the S39 Ignition Switch.

    • Go to next step: If the readings match 
  3. All OK.
Resistance Test

Ignition Switch Position Terminals 1 and 2 Terminals 2 and 3 Terminals 2 and 4 Terminals 2 and 6 Terminals 4 and 6
OFF Key Out Infinite Infinite Infinite Infinite Infinite
OFF Key In Infinite Infinite <5.0 Ω Infinite Infinite
Accessory Infinite <5.0 Ω Infinite Infinite Infinite
Run <5.0 Ω <5.0 Ω Infinite Infinite <5.0 Ω
Start <5.0 Ω Infinite Infinite Infinite 1275 - 1325 Ω
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