One problem related to dash wiring has been reported for the 1998 Ford Explorer Sport. The most recently reported issues are listed below.
Smoke came out of the steering column and park lights turned on although the light switch was in the "off" position. Also moving the multifunction lever to make a left turn signal ,the instument panel showed that the left signal light was stuck "on" and turn signal lights didn't work at the front and rear of the truck. However, the right signal has never malfunctioned. This is very troubling. This event ocurred twice within a week. Dealer has replaced two relays(I paid for), only time will tell if this is the fix.