Low coolant light comes and goes. 1993

[WarWagon]

I have the low coolant light turning on and then off as it likes. Radiator is full and has weak antifreeze if anything.

Does the simple wire sensor in the radiator go bad? Where is the other end of the wire - aka what controls the light and reads the sensor? Black box somewhere or in the guage cluster?

 

[3500GMC]

I remember replacing my 93 sensor. That fixed it. Passenger side rad tank. Constant low coolant warning. As to what wire goes where? Would have to look that one up.

 

[Will L.]

Try pulling and cleaning it - could be some build up.