[rkn463]

For your wiring problems, what is the issue? Is it in cab (radio, heater, etc.) or outside of cab (lights, starter, etc.) problems?

The junction block under the hood is awesome when adding trailer wiring, additional lights or whatever you can dream up to add to an existing circuit.

The in-cab wiring is almost identical to the pickups with the addition of a bank of extra warning lights above the instruments.

My recommendation is to just find where it has been hacked and replace wire runs as needed using solder and heat shrink tubing. replacing a complete harness is quite a chore even if you have a direct swap.

For your brake problems I'll let others jump in as I've had no practical experience with the under cab systems. I have a vague understanding of how they are set up but never understood why they thought adding that much complexity to the system was a good idea.

I can tell you that from the under cab master cylinder to the wheels they are just regular old brakes.