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Home >> Buick >> 2007 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Lighting Systems) >> Diagnostic Information and Procedures >> Headlamps Malfunction >> Diagnostic Fault Information

Diagnostic Fault Information

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
HDM B+ 1 1 - -
High Beam Relay Coil B+ 2 2 - -
High Beam Relay Switch B+ 2 2 - -
Headlamp Low Beam Control 1 1 3 -
Headlamp High Beam Control 2 4 4 -
Headlamp Low Beam Relay Control 3 1 1 -
Headlamp High Beam Relay Control B2580 B2580 2 -
Exterior Lamps Off Input 1, 2 6 6 -
Headlamp Switch Headlamps On Signal 3, 4 7 7 -
Flash to Pass Switch Signal 4 8 8 -
Headlamp Dimmer Switch High Beam Signal 4 2 2 -
Low Beam Headlamp Ground - 1 1 -
High Beam Headlamp Ground - 2 2 -
Headlamp Switch Ground - 6, 7 6, 7 -
Headlamp Dimmer Switch Ground - 2 2 -
HDM Ground - 1 1 -
  1. Low Beam Headlamp(s) Inoperative
  2. High Beam Headlamp(s) Inoperative
  3. Low Beam Headlamp(s) Always On
  4. High Beam Headlamp(s) Always On
  5. Flash to Pass Inoperative
  6. Headlamp Defeat Inoperative
  7. Headlamps Inoperative From Headlamp Switch
  8. Flash to Pass Inoperative
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