No,if you mean the electrical connector on top of what is called the
expansion tank, that is the level sensor.  It is supposed to alert you if
the coolant level drops too low.

Someone could probably tell you where to look for the connection to the
sensor for your temperature gauge if you remind us about the year of your
van.   :-)

On Sun, Apr 17, 2016 at 7:45 AM, B Feddish <uprightbassghost@hotmail.com>
wrote:

> Is that the connector at bottle in the rear?
>
> Thanks,
> Bryan
>
> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
> From: Jim Felder<mailto:jim.felder@GMAIL.COM>
> Sent: Saturday, April 16, 2016 5:46 PM
> To: vanagon@GERRY.VANAGON.COM<mailto:vanagon@GERRY.VANAGON.COM>
> Subject: Re: Another odd issue, temp gauge gone
>
> If it doesn't have any significant temps to read, or if it's not getting
> input from the sensor, you can't see it. Normal, that. But not normal that
> you don't have input. Check your connection at the sender, those little
> wires pull loose and break a lot.
>
> Jim
>
> On Sat, Apr 16, 2016 at 11:13 AM B Feddish <uprightbassghost@hotmail.com>
> wrote:
>
> > Here’s an odd one, while working on the van today the temp gauge needle
> > disappeared.  I don’t see it anywhere.  Where di it go?
> >
> > Thanks,
> > Bryan
> >
>