At 08:03 PM 9/5/2015, Kk Al wrote:
>Thanks for your time and info.�  We are 
>traveling , so I'll check the wire � before we 
>start out again tomorrow. The gauge came to life 
>a couple times for about two minutes then dropped back down.

Your low-coolant warning will still operate with 
the temp sender disconnected, but of course the overheat warning won't.

>The cooling fan and everything else seems to be working as it should.�
>
>We've replaced the coolant pressure bottle and 
>sensor with an upgraded aluminum unit from Van 
>Cafe. I'll double check that as well

Smart.  I just had a bottle start to weep right 
where the hard spot is at the beltline, where the 
minimum level mark is built up.  It also has a 
crack that's visibly open on the outside but not 
yet leaking, on the shoulder between filler and 
sender.  This is a tank apparently made from OEM 
molds (i.e. showing where some numbers were 
erased from the mold) that is less than five 
years old, possibly only three.  I'm impressed, 
but not favorably.  As far as I know the one it 
replaced was original, twenty-plus and showing 
beltline crackage but not leaking, and no 
shoulder cracks.  The one on my '84 was still ok at twenty years.

Yours,
David