I take it you are aware that, like the front socket, the ignition has to be switched on.
If your are doing that then possibly a fault with the socket/fuse. Standard cigar lighter plugs work.
This site (UP's) will give you the info on the "red plug":
www.discovery2.co.uk / Workshop /Injector Harness
It's the plug on the ECU at the end of the injector harness.
The second and third photos should make it clear.
When you disconnect the battery you will need the radio code for when...
Have a look at TD5Alive's website. The instructions are very clear on it. Might give you an idea.
Good luck'
Alive Tuning - Real Land Rover Performance for TDi, TD4, TD5, TD6, TDV6, TDV8, TDCi, Puma
Re the three amigos it could be as stated above but it could also be the Shuttle Valve Switch or poor connections or faulty wiring.
Needs to be put on diagnostics, Nanocom or Hawkeye,to narrow it down a bit.
Have a search for the "Three Amigos". Lots of info.
From RAVE - Loctite 640
Don't forget you will need a new stake nut which has,again from RAVE, to be torqued to 490nm!
Good description here: www.discovery2.co.uk/Faults and Fixes - articles
Easiest is to remove brake pads and caliper for access.
If you have a long cable on the new sensor then it would appear you have been sent one for the front hubs. The cable on the front passes through the inner wing hence the length. The rear has only a relatively (2 foot?) length of cable...
If the guy still has the V5 and therefore can change ownership without any hassle then yes.
If the MOT and tax are expired it would be necessary to make an appointment for an MOT at the port of entry and tax it right away. If the MOT is valid then it could be taxed on line.
Obviously it would...