After fitting diff lock to my 04 landmrrk td5, I need to know how to get the diff light on the dash wired correctly.
I plugged the 2 redundant(mines a manual) spade connectors close to the transfer box in but they illuminate the oil transmission temp light when diff lock is activated.
So over to you Sierrafery

Piece of cake, identify connector C0047/0223 (concentrate to wire colours and pin disposals to not confuse it with 0067 cos it's possible to be fitted in other order there) you have to redirect the black/green wire from pin 1(transmission warning input) to the input from pin 39(black/blu3 = diff lock warning)... cut wires and connect the back/green which is coming from below to the wire black/blue which is going upwards the other sides insulate and let them alone...if something is unclear just ask

finally got round to doing this, not as straight forward as it should of been, as hardly enough length in the wires to get a connector on, and no room for my hands to fit under the dash, so 15min job took 2 hours
But its all working now, Thanks

important is that you managed in the end ... i've done it to a friend of mine ant took me less than 15 minutes, though i used a piece of additional wire to make the connection