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Home >> Chevrolet >> 2007 >> Suburban K2500 >> Repair and Diagnosis >> External Pages >> Different car >> Section 1027 (Lighting Systems) >> Diagnostic Information and Procedures >> DTC B2530 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, remove the fog lamp relay in the underhood fuse block.
  2. Ignition ON, test for voltage at the relay control circuit terminal 86 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 fog lamp relay.
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