Sorry badger, I didn't notice your message till this morning.

Very possible. I chase this problem for some time and it's still there. One day it wasn't then the next day it's been like that and hasn't changed. I learned that when I would turn the headlights on, and blower, the guage would just continue to crep up till it looked liked it was on the verge of damaging engine, but as soon as I turned all the accessories off, it would drop back down. I finally just unhooked the sender wire and installed a Autometer analog gauge so I could have peace of mind. I have checked all grounds and the wiring in the dash, but yet to no avail could I find the culprit. I plan on someday removing the engine harness and completely check resistance in all wires.

Good Morning. I was just reading a post from you regarding high resistance in oil pressure gauge circuit. I happen to be struggling with a high [hot] reading on my temp guage, but engine shows 190 - 201 deg W/ non-contact thermometer @ T'stat housing and right by temp sending unit. Could there be a high resistance issue here as well?
Thanks in advance for ANY input.