Temp gauge testing confirmation

[Gonzo1970]

My temp gauge hasn't worked since they put the headers/duals on.

Testing this, I can say the following:

Key turned to the on position, the needle does move.
Starting the engine, the needle pegs max.
Grounding the wire going to the sending unit produces a needle pegged to the max.

This means its the sending unit, yes?

I have the one with the Round T-Top, not the blade. Looking for one, all the local joints have is the Blade Type. Gonna have to order this one?

Thanks!

-Gonz

 

[vandyman]

If there is Teflon tape or sealer on the threads of the sending unit. It will not be grounded properly and give you false readings.

 

[Gonzo1970]

If there is Teflon tape or sealer on the threads of the sending unit. It will not be grounded properly and give you false readings.

The ones I'm seeing (albeit Blade-Type and not the Round Topped T-Post Type) already have this orange-ish coating on the threads.

-Gonz

 

[pontiacgp]

The ones I'm seeing (albeit Blade-Type and not the Round Topped T-Post Type) already have this orange-ish coating on the threads.

-Gonz

the teplon tape can interfere with the sender not being grounded so you would have no reading, with the reading you have I would say the sender has a short....

 

[Gonzo1970]

So if I was to buy a new one, I would have to scrape all that sh*t off?

-Gonz

 

[vandyman]

So if I was to buy a new one, I would have to scrape all that **** off?

-Gonz

As long as part of it grounds it should work as is.

 

[pontiacgp]

So if I was to buy a new one, I would have to scrape all that sh*t off?

-Gonz

no, you will be good to go with the "sh*t" left on it since it will still be grounded. The problem that arises is from people covering all the threads with a couple of layers of teflon tape

 

[Gonzo1970]

Ok, I thought so.. Just kinda took me by surprise. I was more looking for my testing methodology to be confirmed that it is the sender before I just go replacing sh*t all willy nilly..

Thanks

-Gonz

 

[pontiacgp]

the temperature guage is just an ohm reader so you could check the sender with a multimeter

 

[Gonzo1970]

the temperature guage is just an ohm reader so you could check the sender with a multimeter

Damn... talk about a light bulb getting lit. I never realized. Thanks!

-Gonz