LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hummer >> 2008 >> H3 Alpha >> Repair and Diagnosis >> External Pages >> Different car >> Section 101 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B3948 >> Circuit/System Testing
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Circuit/System Testing

WARNING: This page is about a different car, the 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, turn signals OFF.
  2. Observe the left front turn signal. The turn signal should not be illuminated.
    • If the turn signal is illuminated, test the left turn signal lamps supply voltage circuit for a short to voltage.
  3. Test the left turn signal lamps supply voltage circuit for a short to ground or an open/high resistance.
  4. If all circuits test normal, replace the BCM.
scientia non olet · About LEMON Manuals