Quick safety check?  Turn on your heater and make sure you have normal
heat.. You can get a rough idea if things are right.
  Mine  often read low because of ground issues, too...but one time the
coolant was cold due to a water pump issue, or maybe low coolant.. I
forget..

On Thu, Oct 17, 2019, 5:42 PM Dan N <dn92610@gmail.com> wrote:

> thermostat stuck open? you have to check temp at the radiator using a
> thermometer gun...
>
> I had a similar case... solved by adding ground at the temp gauge switch.
>
> On Thu, Oct 17, 2019 at 4:30 PM Mark McCulley <markmcculley@gmail.com>
> wrote:
>
> > Today while on a 150 mile drive back home I noticed the needle on the
> temp
> > gauge was only half way between the low mark and the LED. Normally when
> the
> > van is warmed up the needle sits at the lower edge of the LED. Everything
> > else seems to be normal.
> >
> > Could the thermostat be stuck open?
> >
> > -Mark
> > ‘87 Syncro
>