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Home >> Suzuki >> 2007 >> XL7 Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Lighting Systems >> Diagnostic Information and Procedures >> DTC B2580 >> Circuit/System Testing
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Circuit/System Testing

  1. Clear the DTC, ignition OFF, headlamp switch OFF, disconnect the high beam headlamp relay.
  2. Verify a test lamp illuminates between the negative battery terminal and the high beam headlamp relay control circuit.
    • If the test lamp does not illuminate, replace the underhood fuseblock.
  3. Test for a short to voltage in the high beam headlamp relay control circuit.
    • If all circuits/connections test normal, replace the BCM.
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