Lamp Out Indicator: Description and Operation
SYSTEM OUTLINECURRENT IS APPLIED ALWAYS THROUGH STOP FUSE TO TERMINAL 2 OF THE STOP LIGHT SW. WHEN THE IGNITION SW IS TURNED ON, CURRENT FLOWS FROM THE GAUGE FUSE TO TERMINAL 8 OF THE LIGHT FAILURE SENSOR, AND ALSO FLOWS THROUGH THE REAR LIGHT WARNING LIGHT TO TERMINAL 4 OF THE LIGHT FAILURE SENSOR.
STOP LIGHT DISCONNECTION WARNING
WHEN THE IGNITION SW IS TURNED ON AND THE BRAKE PEDAL IS PRESSED (STOP LIGHT SW ON), IF THE STOP LIGHT CIRCUIT IS OPENED, THE CURRENT FROM TERMINAL 7 OF THE LIGHT FAILURE SENSOR FLOWS TO TERMINALS 1,2 CHANGES, SO THE LIGHT FAILURE SENSOR DETECTS THE DISCONNECTION AND THE WARNING CIRCUIT OF THE LIGHT FAILURE SENSOR IS ACTIVATED. AS A RESULT, CURRENT FLOWS FROM TERMINAL 4 OF THE LIGHT FAILURE SENSOR TO TERMINAL 11 GROUND, TURNING THE REAR LIGHT WARNING LIGHT ON. BY PRESSING THE BRAKE PEDAL, THE CURRENT TO TERMINAL 8 OF THE LIGHT FAILURE SENSOR KEEPS THE WARNING CIRCUIT ON HOLDING AND KEEPS THE WARNING LIGHT ON LIGHTING UNTIL THE IGNITION SW IS TURNED OFF.
SERVICE HINTS
s10 STOP LIGHT SW
2-1: CLOSED WITH BRAKE PEDAL DEPRESSED
L2 LIGHT FAILURE SENSOR
1,2,7-GROUND:APPROX. 12 VOLTS WITH STOP LIGHT SW ON
4,8-GROUND;APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION 11-GROUND:ALWAYS CONTINUOUS