I am having the same issues. My running lights in the back don't work and the dash lights are out as well. We did find this out until wee 600 miles from home. I had to use the light on my phone to see how fast i was going and we turned the light on in the bedroom just so we had some sort of light in the back. The brake and turn signals all worked. I found the power distribution box in the engine compartment but they aren't labeled. I didn't find one in the cab so i will go back and look again. I am also interested to see if the location 22 was in the engine compartment or cab.
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