1999 Ford Expedition V8 Four Wheel Drive Automatic 239000 miles
Only after driving in wet conditions, the electrical system does not turn off. The instrument panel stays lit, the headlights turn on and off, the blower fan stays on until it drys out which is usually one or two days. Obviously the battery runs down before it drys out. I used to be able to " clear: it out by briefly taking the negative battery cable off but that no longer does it. I had the alternater tested and it seems good and I replaced the battery.