How can I fit a an indicator unit under the dash as I don't know how to get the dash cover off?

therw should be 2wires the black or blue is earth this goes to the body or any think metal on the car the flasher unit on cars are usually under the dash someware put the inducator on and listen under the dash u should here it

Yes it does, oil is carried in the gas, carried from the compressor under pressure through the core under the dash and then returns to the cooling core at the front of the radiator, the O rings are a special compound to handle the gas

can you here the indicator unit clicking if not the indicator relay has gone or could be as simple as a fuse not sure on model so dont know where the relay is normally in fuse box but some times under the dash

I don't know where it is but they are usually easy to find, often on the interior fuse board, have a look at your owners manual or on the fuse board cover to see if it's shown there...failing that if it does operate then turn you indicators on and trace the sound.
Often people think the flasher unit has gone when it either sticks on or flashes very fast, more often in these cases you simply have an indicator lamp blown

Hi, that fuse is under the hood. You can see diagrams of both panels in the owner's manual. Get a free download here if you don't have one:
https://www.fleet.ford.com/maintenance/owners_manuals/default.asp

There is a fuse box under the hood on the passenger side remove the cover and the #10 fuse is for the headlamps. Look on under side of cover for fuse #s.

if both do not work I'd check the flasher unit first or look for a blown fuse (by the passenger side left knee, behind the cover on the console.) The flasher unit is behind the bolster cover above the driver's knees.

So your problem is that the shifter indicator is not correctly aligned? If so look under the dash at the bottom side of the steering wheel, set parking brake, move the gear selector handle and look for the moving part under the dash, this is the indicator cable, it has an adjustment on the mount usually a thumbwheel, the indicator is spring loaded to stay in the park position, use the thumbwheel and adjust the indicator back to P while handle is in park position, then test to see if it is working properly, if you are unable to adjust to proper position the spring unit may be damaged, and it is replaceable by removing the dash, then removing the indicator unit, I would just get one from a wrecking yard from a wrecked Expedition and adjust to your vehicle. Hope this helps, let me know.

Yes.. there is. It's called the 'FLASHER UNIT' Couldn't find any "Orientation Pics" (vehicle location), but it's usually been located under the driver's side dash:

under dash by steering column past the plastic that covers lower dash and get a code reader .