My early 91 has one of those ( dealer installed ? ) Mopar tachs. Here is the deal. If the weather is wet, it works great. If the weather is dry,it doesn't work. If it rained the day before or there was a heavy dew over night, it will work on my commute,but wont work when I start the truck later that day. I have had this truck almost two years and it has done the same thing the whole time. Kind of screwy huh ? Any ideas?
Doug
