Installed a Motorcraft temp sending unit today. Checked temp with an IR heat gun at the sender and spot on at the gauge 190* sitting idling for 30 minutes.Still need to finish wiring the tail end and get the temp sending unit changed. I had an old one hear and it will not work. Guage works when I ground it, but not hooked to the sending unit. Same thing for the oil pressure gauge, though I did buy a new sending unit for it. Engine is grounded in two different spots, so pretty sure it's the sending units. Also, couldn't get the turn signals to work although the emergency flashers did. must be in the column?