Hello- Same truck new problem 1984 f250 7.5l . Everything seemed great, but truck died a few times in a row. Driving down the road checked the gauges and everything looked ok. Next hing I knew the windshield wipers and heater were going ape. The windshield wipers were going impressively fast. I noticed that when I hit the gas, the speed at which they moved was quicker or slower based on the gas. I also noticed the same from the vent. I was trying to find a good place to pull over but within about 1 minute, I began to smell something burning. I then saw smoke that seemed to come from the instrument panel. We have replaced many things lately, but like I said the truck seemed to be running great. New battery, new starter, new alternator, coil, distributor, solenoid and many more things. Truck is totally dead now, no response from key, or lights or anything. Any ideas???? I am hoping to try to figure it out without towing again. Thanks in advance-