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Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.
The website only allows us to help diagnose and fix one issue per post. More questions can be opened for additional concerns. On this post what concern would you like me to help with?
There is only one test that needs to be done. The multifunction display switch needs to be OHM tested to make sure the switch does respond when pressed. If it is then the concern is going to be a failure within the instrument cluster. If needed the wire diagram is below. If you are going to do this test yourself let me know and I will help.
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Since your wanting my opinion rather than the way to diagnose it which I provided prior. I believe this to be the instrument cluster to blame though that is just an educated guess since no diagnostics have been done yet.
Yes this can be a wiring issue.
It is going to be the switch, wiring, or instrument cluster, nothing else.
You will need to remove the switch and OHM test it. If it passes multiple times, then you would remove the cluster and do the same OHM test of the wiring there from the switch and test the switch again but this time at the back of the cluster. If all is good to this point the cluster is to blame.
The only way to test the wiring is with the switch and instrument cluster connectors exposed so a volt meter can be used.
Hello again Chris here,
This post times out tomorrow. I do not see that we have made any progress so far and no diagnostics I have laid out have been done yet. I feel its best I opt out and see if another can help you. Do you agree?