1) Do you have ACE fitted? - if not - there are electrical connections for the solenoid valves and pressure sensor in the ACE valve block, which is fitted to the outside of the RH chassis rail, below the driver's door.
2) TD5 and V8 cruise control switches are the same.
The only differences are between pre and post-facelift vehicles -
Pre-facelift switches are Ash Grey
Post-facelift switches are Black
3 ) Front fog lamp wiring should already be in place, the Green connector should already be there behind the LH side of the instrument binnacle and the front fog lamp connectors (White Econoseal connectors) should already be fitted on the body panel behind the wheelarch closing panel on the back of the front bumper.
You'll also need a relay in position R12 of the engine compartment fuse box.
In addition to needing a front fog lamp switch, you'll also need to replace your existing rear fog lamp switch with one that fits with a front fog lamp switch.
On vehicles with no front fog lamps, the rear fog lamp switch fits at the top of the LH side of the instrument binnacle.
On vehicles with front fog lamps fitted, the front fog lamp switch fits at the top of LH side of the binnacle and the rear fog lamp switch fits in the space below it.
You can't use your existing rear fog lamp switch, as it's a different shape to the one fitted with a front fog lamp switch.
You'll also need to have the front fog lights 'enabled' in the BCU.
4) If you have the heated screen connectors (see pic below) on the scuttle panel under the bonnet, then the Green connector should be behind the switch blank above the heated rear window switch in the 'six pack' on the facia.
You'll also need a relay in position R8 in the engine compartment fuse box.
You'll also need to have the heated screen 'enabled' in the BCU.
RH heated screen connector
There's also a corresponding connector for the LH side of the heated screen, but I couldn't find a picture of that side.
You would find a copy of RAVE very useful, it has - wiring diagrams, circuit descriptions, connector details, user handbook, workshop manual, modifications and recall details, accessory installation instructions, etc...
You can download it for the Discovery II as 'rave01.iso'
Here -
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