Temp gauge sending unit questions

[Pstyckiewicz]

So I noticed that my temp gauge did appear to be working on my M1152A1. I tested the gauge by unplugging the wire at sending unit and grounding it to the engine. This made the gauge go all the way up and the over heat led to come on. That led me to believe that the gauge was good and the sending unit was bad. Changed it out yesterday (sucked),and still no movement from gauge. I let it run for 10-15 minutes and no movement. These are my questions. Did my redneck gauge test not really mean anything?, Did I not let it run long enough to get warm? And also during install I used Teflon tape on threads (affect continuity?)?
Part number 6015561…..for gauge with over heat LED

 

[Mogman]

You can take an ohm meter and confirm you have continuity between the sending unit body and the engine block.
Personally I only use Teflon tape on domestic water pipe, everything else gets thread sealer.

 

[Pstyckiewicz]

I have a meter but I suck at knowing how to use it. Not sure what to set it to.

 

[Mogman]

how to use an ohm meter - Search Videos

www.bing.com

You want to see the same reading as when you touch the leads together.
If your ohm meter is not auto ranging then set it to the lowest scale.

 

[Pstyckiewicz]

I have a cheap one so I’ll have to set it to the lowest setting. Thanks for the great info.