sensor measuring engine water level

& Nbsp; & nbsp hello; friends, my car engine water & nbsp; fully loaded & nbsp; Although there is a lack of engine water indicator light was on stop & nbsp; with warning lamp. Water & nbsp; There is a sensor at the top of the max level, just below the reservoir where the water is placed, I think this is the problem, & nbsp; because & nbsp; Warning lanterns do not light when I disconnect (disable) the cable connected to this sensor. Knowing how to disassemble and clean this sensor & nbsp; I wonder if there is