2500 Aux switches / upfitter code.

[Dennis Gulau]

I've got a 2018 2500 with the aux switch option.

To program the switches in the commercial settings I need a code. Apparently the previous owner changed the code.
Is there any way other than a dealer visit to reset the code?

Thanks.

 

[Sandevino]

Try 0000

 

[POINTMAN380]

If that doesn’t work try 0001

 

[Dennis Gulau]

I've tried all the "logical" changes, nothing works. Odd, because the switches were not used for anything by the previous owner. Odd that he would change it.

Maybe this is a dumb question, but does the upfitter harness have to be plugged in for the code to work? I have not plugged the harness in yet.

 

[Sandevino]

I've tried all the "logical" changes, nothing works. Odd, because the switches were not used for anything by the previous owner. Odd that he would change it.

Maybe this is a dumb question, but does the upfitter harness have to be plugged in for the code to work? I have not plugged the harness in yet.

No, the harness doesn’t need to be plugged in. 0000 is the factory default code for the commercial upfitter config in the EVIC. Pulling the battery doesn’t reset the code.

Changing the code takes effort so if 0000 doesn’t work it could be anything. Last I knew, the dealer can’t reset it either.