I have installed a High Series cluster into my EL Wagon, i have also changed the oil pressure switch to enable the gauge to work but i haven't been able to get the low coolant sensor working (light continually flashing on the dash). I have changed the coolant bottle so that i have the sensor to hook up but i cannot find any wiring under the coolant sensor bottle to hook this wiring upto which is where it is on the Fairmont.

Any ideas would be much appreciated

if you have ABS, then the coolant sensor wiring will be under the bottle.
No ABS = no wires.

Chances are you'll have to add the wires directly to the cluster.
Even models with ABS and the plug in the engine bay are missing the link inside the cabin.

You have to run One wire to Pin #3 on the RHS of the cluster.
The other wire you can earth out in the engine bay.

Read:
http://www.fordmods.com/forums/documents.php?doc=14

I hope this helps

Do you have any idea what colour wire is pin #3 on ther RHS is, just to make sure i get the right one, The car has ABS but not plug

Yellow with a red stripe.

It Will have to be added to the connector.

This may be of help: http://www.fordmods.com/forums/viewtopic.php?t=28676