There is very little that can go wrong with a coolant level probe.  I am
always mystified when someone reports that replacing it solved their
problem.  It's just two metal prongs poking down to touch the coolant.  If
the prongs are somehow covered with an insulating coating, cleaning them
should do the trick.  If the prongs are not electrically connected to the
exterior plug/socket any more, it should be easy to check with an ohmmeter,
but this seems unlikely.

Larry  A.

On Fri, Dec 26, 2008 at 4:06 PM, John Rodgers <inua@charter.net> wrote:

> Joy,
>
> I have had this problem on occasion, but never had to do more than
> replace the coolant level sensor in the coolant tank in the rear. This
> little system senses the resistance between the two terminals on the
> sensor probe, and when the coolant lever drops below the ends of the
> terminals on the probe, there is an open condition that is read as
> "Infinte Resistance" and the light comes on. A loose connection any
> where in the system will cause the same results. You might want to work
> your way from back to front, checking wire security. If nothing is
> found, then first replace the probe, and test, and if you get the lights
> again, test the circuit in the instrument panel up front.
>
> Good luck,
>
> John Rodgers
> 88 G:L Driver
>
> Joy Hecht wrote:
>
>> Hi folks,
>>
>> I think my coolant / temp sensor may be going, but I'm not sure, wanted
>> your
>> opinion.
>>
>