Ford 5610 temperature gauge not working

[Boomerang]

Sender issue? where is sender?
Thermostat issue ? Where is thermostat ?
Any ideas ?

 

[agrimax]

Temp sender...no.6
Thermostat...no.10
Take the wire off the sender and make a good contact with the end terminal on the wire against the head. Turn on ign and if the gauge rises,the sender is faulty. If it doesn't rise, either the gauge is faulty or there's a broken wire or bad connection. Check fuses first too. Might be the same fuse for the fuel gauge.Can't remember.Is it working?
The thermostat could be stuck open,but the gauge should still rise slightly eventually.

 

[Boomerang]

Thank you, fuel gauge works ok, temp gauge doesn't move , it stays at cold when warm ,but when switch warm engine off temp gauge moves slightly from cold to beginning of cold .