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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting >> Diagnostic Information and Procedures >> DTC B2575 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, remove the low beam relay in the underhood fuse block.
  2. Ignition ON, test for voltage at the relay control circuit terminal of the underhood fuse block.
    • If voltage is present, test the control circuit for a short to voltage. If all circuits/connections test normal, replace the low beam relay.
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