LED's need to be in the right way round, simple way to test is to have a battery and two testing wires then check to see which end is the +ve end so you can insert it into the holder that way
If you look on Bolt On Bits website, the plugs on the indicator wires were wired in one direction on the 300tdi and changed over on later models. You have to buy the correct lights.
As above try them on a battery and change wiring over to suit.