[s-cars] Mysterious Elec Problem - Temperature Warning Light always on

[Mike Bishoff]

>Mike Bishoff wrote:
>> I checked the anti-freeze level and it's well within the 
>> acceptable range. 

>My '89 200 was real particular about the anti-freeze level.
>Make sure it is full, and not just within range.  If the
>light still comes on, then look at the sensor(s).

-- 
Kent McLean
'94 100 S Avant
'89 200 TQ, "Bad Puppy" is no more

The anti-freeze level is pretty much up at the top of the reservoir with
just enough gap for expansion. I haven't had any problems until recently so
I'm assuming the sensor circuit, and not the switch, is at fault. 

I would think that I could *fool* the sensor by short-circuiting it and
closing the switch and that would make the warning light go off, but this
did not work. I'm assuming of course that the switch is NC when the tank is
full. Even so, I removed the jumper I used to short the leads making the
circuit open and the results were the same.

Any other ideas?

Mike