OK good news. So all seems to be "able" to work. So you need to "enable" your truck with a new, universal, prewired fuse panel harness.
ExampleAt that time, I recommend installing a bypass system, alternator and take heater motor out and refurbish. i can kelp with all that. Step by step. Without new harness and all the fuses it supplies, you will have ongoing issues I'm afraid.