O.K. , I've read all the posts I can find on here( feel free to direct me to one I've missed), and none seem to cover my issue...I have a 1985 Gl-10 Wagon 4wd dual range 5 speed w/a1.8 EA82 from an 89 dl,carb'd. My problem is with the heater control head, there is apparently a short internally. I ch...