What is the load control relay?

Smelter

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Of the 4 relays behind the ecu in the front nose of the sled, the very first relay is called the load control relay? Any input on this? the other three are the headlight, fuel pump and rad fan from front to back.
 
The load control relay powers all the lights, auxiliary DC jack and backup buzzer. The relay is energized when it's coil receives a ground signal from the ECU after the engine is running. If it fails the engine will still run. It is also interchangeable with the fan and fuel pump relays.
 


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