WHen I got mine home from it's 2200 mile journey (I bought it in Arizona and live in Georgia) I started my maintenance on it. The battery was original and six years old - replaced that right away. I then noticed corrosion - the battery ground cable was HORRIBLE where it bolts to the chassis. I ended up replacing the ground cable and wire-brushed the bolt. I'd suggest you confirm you have 12 volts from the battery positive terminal to ground.

For ground, use the engine block or the chassis of the fan module. If the battery ground cable is bad, that will reveal it.

If you have NOTHING, no lights, no start, no dash panel indications, it is not a module, it is the battery cables, battery cable clamps, or the connection in the engine fuse block, which is that little black box near the battery. You will find three fuses in there - if the 200 amp one is open, you will get NOTHING.