Hello

I am in the midst of troubleshooting a 4x4 problem with my 2001 blazer ls (P1875 error), currently none of the indicators light up on the switch

* tccm has been replaced
* connections to the tccm are good
* connections to the 4wd switch appear to be good (though on one of the pin outs im not getting any power, can't remember which one at this time)


I have been reading and checking all the wiring diagrams I can find on here and they helpful to a point, the only component I cannot find location of is the VCM or CKT 1694, could someone kindly tell me where exactly I can find the VCM or the CKT in question so I can inspect the wiring for any faults.

I will be testing the DTC jumper codes tomorrow to see if I can pull any codes from it but would be helpful to know where I can find the VCM so I can check it at the same time.

Thanks for you help.

 

P1875 - 4 Wheel Drive Low Switch Circuit

The VCM (vehicle control module) is located under the hood on the passenger side fender.

CKT 1694 is located on connector 4 (black connector according to my 2000 wiring diagram) pin 23 and is a gray wire with a black tracer.