99 Yukon 4x4 problem

[Bryan Hogeland]

My Yukon is pulling a p1875 code. I've put two new switches in it and still nothing! Any ideas?

 

[OR VietVet]

First: Welcome to the forum from Oregon.

Second: Code P1875 possibilities:
P1875 Possible Causes
What does this mean?

• Faulty 4WD Low Switch
• 4WD Low Switch harness is open or shorted
• 4WD Low Switch circuit poor electrical connection

As you can see, it does mention the switch but not only that. Have you done any other work recently in this area or under the rig, even if you don't think it could have anything to do with this problem?

Third:

We recommend that you put all your rig(s) info in your signature so we all don’t have to guess at year, make, model, engine size, trans, rear axle locker…….etc. While you may have posted pertinent info in your first post, you may forget to do it again and the info is needed by us anyway. Makes it way easier on all members that attempt to help, to have that info right up front. It is also recommended that you take a pic of your RPO codes, on the inside cover of the glove box, and post that image in your signature. All this info will greatly help those that will try to help with a problem.


If there is any other info, like upgrades, mods or recent mechanical/maintenance work done, that would be helpful in any post as well. Too many times a question is asked by the poster and after about 10 responses we find out that the poster has done recent work to attempt to fix the problem or work that was done that SEEMS not related to the problem.

 

[exp500]

There was recently a post about this , had good pics of switch/motor on transfer case disassembled. Fixed by cleaning. I'll try to find it.

 

[exp500]

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