What is " crossed out the wires " ? If you keep guessing and changing parts randomly you will eventually fix the problem.
Hint: if fan runs on high , it's not a fan problem. Having missing fan speed control is most likely the resister has lost one or more coils, losing fan speed. If the fan runs, it's not a fan relay problem.
Try not to use vague slang words. You know it, but we can't see it, slang has different meanings everywhere.
The factory service manuals your year, are a free download search in the forum. Book 1 section 8A, 8B, heating, ac, it's all there.
I have 95 K2500 xcab, shtbd. Doing compressor, dehydrater, reservice 134. Right now.