i will take a picture soon of my '85 90 dash with a defender 200tdi conversion. when i bought mine a few months ago only the oil and battery light worked.
first thing i fixed was the difflock light. Previous owners have been driving around with difflock on..... ouch. Next was the brake fluid level warning light, parking light and heater coil relay light. low fuel light had a bad connection. high beam light and indicator light worked when they want to.
not too complicated to get the lot working gain. handy when you have the original wires and wiring diagram with original colour coding.
hope to send my landy for COR soon. (African equivalent of MOT). They not too worried about the little stuff in this part of Africa, as long as the wheels turn, you have at least 1 door on and the reverse light works, i should have a pass:)