temp gauge not working after belt replaced

[bigbikes]

Guys
Yesterday I replaced the belt and plugs on my vt 6cylinder and since then my temp gauge isn't working.
What have i done. I had a bit of a look around and everything seems to be ok, but i have probably missed something
The black wire connector on the thermostat seems ok and connected, are there any other wires that I may have disconnected??
Thanks guys

[Changa]

Yeh this happened to me put with me I had accidently knocked off the wire on the thermostat housing, which I take it you said you have already checked, so I have no idea haha