1984 B2000 in-op guages/radio

Hoping for some help.. I have a 1984 B2000. Previous owner had some crazy stereon in it, and has hacked up the wires. The stereo would cut in and out (maybe grounding out) I pulled the stereo, and somewhere along the way the power to the dash/gauges was "cut". Does anyone have a wiring diagram, or some ideas on which wires do what? Its a big guessing game and is getting frustrating not being able to track down the culprit. Thank you in advance for your help!

I went to The12volt.com and found this : https://www.the12volt.com/installbay/stereodetail/1360.html
maybe that will help.

Thanks, I had found that, unfortunately some of the wires are so hacked up its tough to find the correct wires.. I'll keep plugging away at it

Well I found the cause of the in-op radio, was a bad ground at radio wiring harness. Anyone have a wiring diagram of the gages/dash?