Temp gauge

[littletourque]

94 suburban gauge never worked when I bought the truck have swapped engines and still no temp gauge.i have seen the needle move 2-3 times since getting it together and running but it's just a quick movement and right back to buried to the left of gauge.is there more then one ground that will effect this gauge?

 

[Frank Enstein]

Yes. The sending unit needs the threads to ground. Your sender may have Teflon tape on the threads insulating it from ground. I use anti-seize on the sending unit threads.
The gauge grounds are commonly compromised on vehicles this old.
I go as far as hose clamping a wire onto the sender body and connecting the other end to the gauge ground.

 

[rzr6-4]

When you ground out the sender on the block or something the temp gauge should max out. If it still doesn't move then its an issue with the gauge cluster itself.