B0780 CHEVROLET – Four Wheel Drive Low Range Indicator Circuit

 

B0780 CHEVROLET Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

B0780 CHEVROLET Possible Causes

 

Faulty Transfer Case Select Switch,Transfer Case Select Switch harness is open or shorted,Transfer Case Select Switch circuit poor electrical connection,Faulty Transfer Case Shift Control Module

 

B0780 CHEVROLET Description

 

The Four Wheel Drive Low Range (4LO) indicator circuit consists of an LED dimming supply circuit and a 4LO indicator control circuit. When the 4LO mode is selected, current is supplied to the 4LO indicator by the LED dimming supply circuit, traveling through the 4LO indicator LEDs, at which time the transfer case shift control module supplies the ground through the 4LO indicator control circuit.