W202 warning lights

buzz66

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Joined
Jul 11, 2006
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central belt, scotland
Hi , has anyone came accross a fault with the screenwash and radiator level lights coming on simultaneously? It seems to be an intermittant fault. i have checked the plug connections and they are sound. on checking the wiring diagram (haynes) there seems to be two independant earths (one for each sensor) so no common link there. Am i correct in thinking that each sensor has a resistor built in?, then, if a fault occurs the switch "bypasses" the resistor? Does anyone know of the resistance of these sensors and if
they "open" or "close" when they detect low levels?
 

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