Instrument cluster lights stay on

[FarmerDale]

Did a cab swap for my 87 V10. Had planned to use a new wiring harness, but the old one in Brownie appeared to be in good shape, so I moved that over. While I had the harnesses out I looked them over and spliced (solder and shrink wrap) in the places that had hard insulation, etc.

The problem I am having is:
Instrument cluster lights are on unless dimmer is all the way clockwise (this might have to do with the LEDs I put in. I assume a resistor should be installed to return dimming function.
Just last night I installed a bulb drivers side parking light and it lit up. What's most amazing about that is the light switch is removed!

I'm assuming these two issues are closely related, but would like a little direction as to where to look for what problem.

Thanks