Golf clipper cab 91 temp guage/sender.

The temp guage on my clocks doesn't work, but recently the red LED has started flashing for the first 10 minutes or so of a journey.

Where is the temp sender located?  I'm thinking if I replace this, my problems will be solved. Any ideas?  Cheers.

it will be in the front flange on the head, either a single pin with a spade or a 2 pin with a clip. either way one of the wires will be red/yellow