Circuit/System Verification
WARNING: This page is about a different car, the 2006 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, observe the scan tool BCM Auto Hdlp. Disable Sw. parameter while cycling the headlamp switch between the Auto and Off positions. The parameter should cycle between Active and Inactive.
- If the parameter does not cycle between the specified values, refer to Headlamp Switch Test .
- Observe the scan tool BCM Headlamp Switch parameter while cycling the headlamp switch between the Auto and Head position. The parameter should cycle between Active and Inactive.
- If the parameter does not cycle between the specified values, refer to Headlamp Switch Test .
- With the headlamps ON, observe the scan tool BCM Flash to Pass Switch parameter while pulling and releasing the flash to pass switch. The parameter should cycle between Active and Inactive.
- If the parameter does not cycle between the specified values, refer to Turn Signal/Multifunction Switch Test .
- With the headlamps ON, observe the scan tool BCM High Beam Select Switch parameter while switching the headlamp dimmer switch between the low and high beam positions. The parameter should cycle between Active and Inactive.
- If the parameter does not cycle between the specified values, refer to Turn Signal/Multifunction Switch Test .
- Command the Low Beams ON and OFF with a scan tool. Verify the low beam headlamps turn ON and OFF.
- If the low beam headlamps do not cycle between the commanded states, refer to Low Beam Headlamp Circuit Test .
- Command the High Beams ON and OFF with a scan tool. Verify the high beam headlamps turn ON and OFF.
- If the high beam headlamps do not cycle between the commanded states, refer to High Beam Headlamp Circuit Test .
- Ignition ON, headlamps ON, observe the high beam indicator on the IPC while cycling the high beam dimmer switch ON and OFF. The indicator should turn ON and OFF when changing between commanded states.
- If the indicator is always OFF or remains always ON, replace the IPC.