Yesterday I had a period where the fuel gauge and the coolant gauge both
were reading very low, and inaccurately... I think this may be a ground
issue.
  In the past, my temperature read lower than it was when tbe connection
was loose at tbe sender, but baving two instruments in tbs same gauge
reading too low, that is Odd...any ideas?
   For what it's worth, wben .my coolant temperature gauge showed "cold" I
bad a fright... thinking I could have no coolant...(I gave up on my
"coolant level" Warning light years ago).   but a check of the other gauges
(no alternator light) normal oil temp, normal Oil pressure..that easily
confirmed the temperature was ok...And I use my trip meter for my main fuel
quantity calculations... I'd driven 260 miles only since my last
gas...there we're at least 5 gallons of gas in the tank, yet the gauge
needle was below the red...
thanks, Don Hanson