Bulb Filament Check

1 If in proper working order, the message "FRONTLIGHT FAILURE" will appear on the SID unit display in the event of bulb failure in any lamp.

If the BLACK PANEL is activated the display should light up.

2 Connect a ISAT Scan Tool and select the "READ VALUES" menu and then "INPUT SIGNALS".

3 Lift out the filament monitor and connect a jumper lead between terminal C2 and ground. The message should now appear on both the SID and Scan Tool displays.

If the message is displayed, the filament monitor is faulty and must be replaced.

If no message is displayed, continue with point 4.





4 Connect a BOB to the SID unit and check the wiring for continuity/shorting between terminal G2 of the filament monitor and pin 4 of the SID unit.

Note: If a message is always displayed on the SID unit, check the filament monitor's grounding cable.