Continue to Site

Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Testing a 1 prong Wif sensor with a multi meter

gsc1ugs

New Member
Could i get advice please on how to test a 1 prong Wif sensor with a multi meter, it only has 1 prong so i dont know where to put the black side of the multi meter, this sensor is on a fuel filter to detect water, i want to know if its broken
 
Cant see any numbers 1 prong plug and this slots in filter, been told earth the metal
Cased filter housing
 

Attachments

  • D3B7F321-8FA2-4585-A6CC-C360882FBD1D.jpeg
    D3B7F321-8FA2-4585-A6CC-C360882FBD1D.jpeg
    1.3 MB · Views: 37
Cant see any numbers 1 prong plug and this slots in filter, been told earth the metal
Cased filter housing
Please post some more pictures so we can see all sides of the device. include some dimensions.

Also make sure that the camera focus is on the device and not on the background.
 
One pin in the connector means it's just a metal probe electrode.

If there is water contamination in the filter, the water would cause some conduction between the probe and filter case ground.

The only electrical test you can do is ensure the probe wire is connected to the connector pin.

If it's reading contamination when it should not, try with the probe plug disconnected?

If the fault clears when the probe is unplugged, I'd suspect a crack in the plastic near where it fits through the filter casing, that has moisture in the crack, causing a short. That would need a new probe.

If the fault still shows, the problem could be a connector with corrosion between pins or a wire worn through against some metalwork, or with cracked insulation & water or corrosion between that and some metalwork somewhere - a short or some "leakage" on the sense wire between the filter and whatever ECU it connects to?
 
Thanks for info, i’m goin unplug see what happens because my friends van is same slightly newer and he has no lead goin to the housing so its not testing for water, my van is still a none runner
 

New Articles From Microcontroller Tips

Back
Top