I have a 1990 F-250 with a 460 in it. I use this truck primarily for hauling stuff (scrap metal, firewood, mulch). It might sit for a month or two without being started, recently I needed to use it and I noticed that the turn signals, heater/AC, and reverse lights all stopped working at the same time. I swapped fuses around but had no luck, I think something must have chewed through a wire somewhere. Just thought someone might have an idea where to look before I start chasing wires, any ideas?