HARNESS AS-LIGHTING 2288581 - Caterpillar

Illustration 1 g00788553
The photograph shows the electronic control modules. (1) Machine ECM (2) Implement ECM
Illustration 2 g00709793
Implement ECM (3) Green LED (4) Yellow LED (5) Red LED (6) Implement ECM
Table 1
Normal LED Status    
Key Start Switch     Green LED     Yellow LED     Red LED     Remarks    
ON     ON     OFF     OFF     The red LED will momentarily illuminate when the key start switch is turned from the OFF position to the ON position.    
OFF     OFF     OFF     OFF     The green LED will remain illuminated for approximately 10 seconds after the key start switch is turned to the OFF position.    
Table 2
Abnormal LED Status    
LED Display     Description and Action    
No LED is illuminated.     Power is not supplied to the ECM.    
The yellow LED is illuminated.     Communications between the ECM and the monitor have malfunctioned.    
The red LED is flashing or illuminated.     The ECM has malfunctioned. Replace the ECM. See Testing And Adjusting, "Electronic Control Module (ECM) - Replace".