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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Lighting >> Diagnostic Information and Procedures >> Headlamps Malfunction >> Diagnostic Fault Information

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Low Beam Hedalamp Control 1 1 3 -
High Beam Hedalamp Control 2 2 4 -
Low Beam Relay Control 3 1 B2575 -
High Beam Relay Control 5 2 B2580 -
Headlamp On Switch Signal B257A 6 - -
High/Low Beam Select Switch Signal 5 2 - -
Low Beam Headlamp Ground - 2 - -
High Beam Headlamp Ground - 2 - -
1. Low beam headlamps inoperative
2. High beam headlamps inoperative
3. Low beam headlamps always on
4. High beam headlamps always on
5. High beam headlamps always on with low beams
6. Manual headlamps inoperative