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Home >> Chevrolet >> 2012 >> Camaro LS, Standard Trans >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Lighting System >> Diagnostic Information and Procedures >> DTC B1002 >> Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, exterior lamps OFF, disconnect the harness connector at the K28 headlamp leveling control module. It may take up to 2 minutes for all vehicle systems to power down.
  2. Test for less than 5 Ω between the ground circuit terminal 25 and ground.
    • If 5 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, repair the open/high resistance in the ground connection.
    • If less than 5 Ω 
  3. Ignition ON.
  4. Verify a test lamp illuminates between the B+ circuit terminal 1 and ground.
    • If the test lamp does not illuminate 
    1. Ignition OFF, disconnect the X1 harness connector at the X50A fuse block - underhood.
    2. Test for infinite resistance between the B+ circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the B+ circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the X50A fuse block - underhood.
    • If the test lamp illuminates 
  5. Test or replace the K28 headlamp leveling control module.
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