23
Mar
4wd Transfer Case Position Sensor Selector Switch. The 4WD transfer case encoder motor position sensor or the selector switch may fail causing the service 4WD message to be displayed. After 2O minutes the SERV 4WD light illuminates and the system will not engage the 4WD. 4WD engages when the selector switch is turned to either 4H or 4L and returns to 2WD by the selector switch. The selected position indicator light will flash until the transfer case completes the shift.
No lights on your selector switch etc. ACDelco 88962315 GM Original Equipment Transfer Case Range Select Position Sensor Visit the ACDelco Store. This is a common problem that truck owners have to face. Here are some causes that lead to the break-down of the sensor selector switch. If in 4WD the system. The encoder ring tells the 4WD switch what gear the transfer case is in.
Next the electronic control module looks at the speed sensor and the.
Wish I could be more specific and good luck. Lights on selector switch flash when key on but go out. 4WD Transfer Case Position SensorSelector. The encoder ring tells the 4WD switch what gear the transfer case is in. Check Transfer Case control module sensor andor 4WD transfer case encoder motor position sensor andor the selector switch. Fault codes stored in the transfer case control module will be of assistance in determining the exact fault causing the message to be displayed.