Vts, No Temperature Gauge Movement

[VTR_Dan_VTS]

friend recently brought a 52 plate VTS.
when driving it back i noticed that there was no movement at all in the temperature gauge dial, i know they are usually suppose to run at around half on the gauge.

i know that the engine has recently been changed for a lower mileage one.
under the bonet, there is a green insulated wire hanging loose, i cannot find where its suppose to join to, is this the cause?

i did drive it over 130 miles back home and the engine seemed fine, although when i got it back i realised the oil had all drained from the gearbox and the plug/bung was missing but apart from that it seems awesome!

All help will be much appreciated! Thanks, Dan

[Yates]

have you tried changing the thermostat? think its thermostat anyway

could be that wire, unsure on where it goes to as never had that problemo

[VTR_Dan_VTS]

Dont think it is the thermostat, recently had a new one. Plus i think if the thermostat goes then it just reads its overheated all the time (im probably wrong though lol).
BUT can you be 100% sure it is not that green wire?
Just trying to scale down the problem and solutions i should try... thanks!

[Predator_R32]

like said check the wires and all plugs are in right, make sure theres no water in them and the connections are clean

sometis leaving the battery disconnected overnight works :y:

[VTR_Dan_VTS]

Cool will try all above, any other ideas?