Testing Water Level Sensor

Jan 08, 2004 3 Replies
R

Hi guys n gals



Prompted by a previous post, the water level sensor in the expansion tank of a rangie - how do I test its works? (without breaking my very fickle water pies to drain)?



I ask, as I would like this sensor to work, but it is not wired up at all, it just has two connections, and when I pulled it out the tank, it just seemed to have a float that never actually opened or closed the contacts.


Does it require a positive wire to switch then to light then to earth to make it work?



Thanks



Roger


1956 Series 1
86"
3500cc V8 Petrol
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M

Twas Thu, 8 Jan 2004 15:09:52 +0000 (UTC) when "Rog" put finger to keyboard producing:

I'd say take it out, put a multimeter accross it (testing for resistance) and lower it into a container of water.

-- Regards. Mark.(AKA, Mr.Nice.) ___________________________________________________________ "To know the character of a man, give him anonymity" - Mr.Nice.

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A

These sensors are very poorly made and eventually leak water into the contacts and then fail. I believe the wiring is as you stated, there will a feed from the dash lamp and a connection to ground. The float is a magnet with a hole which slides up and down a central tube which contains a reed switch. When the float drops too low the reed closed making the circuit and thus the lamp comes on and you start to panic!

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R

Thank You Both very much, will wire this week end

Rog

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