BALL BEARING 4364460 - Caterpillar

Illustration 1 g02202474
Typical rocker switch with lamp circuits (1) Typical chassis headlamp sense provides power for backlight (2) Typical backlight circuit (3) Typical chassis backlight intensity provides ground that is varied to control brightness for indicator lamp and backlight (4) Typical indicator lamp circuitNote: Illustration 1 is typical. Always verify the pin and wire numbers in the Electrical Schematic of the machine you are working on before beginning these procedures.This story applies to indicator lamps in rocker switches. This story does not apply to indicator lamps in instrument clusters or other monitoring hardware. This LED circuit is not monitored for diagnostics by an ECM, this fault will not generate a diagnostic code.All similar rocker switch indicator lamp circuits are checked with this procedure. All rocker switch indicator lamps are LED lamps and are part of the rocker switches. These lamps are not replaceable.The rocker switch indicator normal operation is: Rocker switch is off - Indicator lamp is offRocker switch is on - Indicator lamp is onIf a lamp does not illuminate when the rocker switch is on, perform the following procedures:Test Step 1. VERIFY THAT THE INDICATOR LAMP WILL NOT TURN ON
Turn the keyswitch on.
Turn the rocker switch to the ON position.
Observe the indicator lamp.Note: Verify that the lights are not dimmed. If the lamp is in bright sunlight, shield the lamp and make sure that the lamp is not on.Expected Result: