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Home >> GMC >> 2012 >> Yukon Base, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Exterior Lights >> Lighting System >> Diagnostic Information and Procedures >> High Intensity Discharge Lamp Malfunction >> Diagnostic Fault Information

Diagnostic Fault Information

Circuit Short to Ground Open/High Resistance Short to Voltage Signal Performance
Relay Coil Control 2 1 1 -
Headlamp Low Beam Control 1 1 2 -
Low Beam Headlamp Ground - 1 - -
1. Low Beam Headlamps Inoperative
2. Low Beam Headlamps Always ON
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