I have a 98 xj that I purchased recently. Notice that it has developed a dash short. Start the vehicle and everything is good, then once and a while all the dash gauges and dash lights quit working and the airbag light comes on. If i fiddle with the headlight switch the gauges and dash lights come alive again. seems more prevalent at night when the headlight switch is on. Rig has 288,000 original miles with many replacement parts. Could it be as easy as a worn out headlight switch with a dead spot in it? Does the power for the gauges run thru the headlight switch? Need Help, not electrically inclined at all.