'91 100q low coolant light AutoCheck warning...

[Snoopy]

It may be the connector pins in instrument cluster, not the switch itself. 
They are known to suffer from "cold solder" (the pin seems in place, but it's 
actually not making full contact). I fixed this by removing the cluster, and 
touching each connector's solder joint with a soldering iron.

On 2010.07.26 05:39, wadd-wadd at usa.net wrote:
> always kicks in regardless whether if the reservoir talk is full or not.
>
> Any thoughts on how I can get the low coolant light to not come on when the
> car is not overheating and is not low on coolant.
>
> Should I just replace or clean the coolant tank sensor?
>