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Home >> Chevrolet >> 2006 >> TrailBlazer 6.0 H, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Lighting Systems) >> Diagnostic Information and Procedures >> Turn Signal Lamps and/or Indicators Inoperative >> Circuit/System Testing >> Turn Signal Switch Circuit Testing

Turn Signal Switch Circuit Testing

WARNING: This page is about a different car, the 2007 Pontiac Torrent and 2007 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the turn signal switch.
  2. Ignition ON, install a test lamp between the turn signal voltage supply circuit and ground. The test lamp should flash ON and OFF.
    • If the test lamp does not flash, test the voltage supply circuit for a short to ground or an open/high resistance.
  3. Install a 3-amp fused jumper wire between the voltage supply circuit and the turn signal circuit. Verify that the proper turn signal lamps are ON.
    • If the turn signals are not ON, test the signal circuit of the turn signal switch for a short to voltage, short to ground or an open/high resistance.
  4. If all circuits test normal, test or replace the turn signal switch.
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