Cat engine temp sensor

Your not a knob by any means.. So heres how I check the single wire sending units
Use your multi meter set it to read ohms which the symbol alittle like a upside down horse shoe.. put 1 probe on the body of the sending unit and the other probe on the terminal the wire attaches too then see what you get for a reading if my memory is right it should read around 200 ohms give or take some if you don't get a reading or very low reading like 30 or 40 ohms then your sending unit is bad.. Maybe somebody will jump in that knows exactly what the reading should be but if its low by meaning 60 or less or next to nonthing that means its not working... this is just a Layman's version .. Iam sure there's people on here that can be more in detail.. best of luck to you

 

You should be able to leave it in the housing

 

I didn't go back thru you other posts but did you check you sending wire from your gauge to the sending unit to make sure it didn't have a break or short in it by running a continuity test ??? And have you checked to make sure you have power going to your water temp gauge ??

 

Glad to hear you got it working !! Thanks for the update too
I've got a project truck in my shop that 4 out the 5 temp gauges are not working the wiring in this truck is a disaster