Originally Posted by
95 TA - The Beast
It is a wiring harness corrosion issue. Seen it more than once. You have to trace back the power wires from the fuseable links by the battery.
Drop the price on the vehicle as a known issue. Otherwise you will be spending a lot of time tracking it down.
If you do track it down and repalce hte bad section(s) of wire, be sure to either solder in the new section, or use weather-tight crimps (the ones that you heat and they seal internally), otherwise the issue will come back.