Diff lock light

hi guys

Heading north on M5 today the diff lock light came on on my 2001 td5 discovery

Diff lock obviously not engaged

Anyone else had this ??

Expensive to put right ??

Has the gearbox / transfer box got to come out ???

Any light shed would, I'd be grateful

Nic

If these have the same switch arrangement as the earlier models (I dunno) it just might need adjusting a tad?(it screws in and out with a locknut to set.)
Or , if it works by earthing the switch (again, dunno) you may have a wire shorting between switch and bulb but probably near the switch.

Could be just the wet weather, mine does that on occasion, but it is a D1 ...
or maybe a chafed wire ...

Cheers guys
We live on the Somerset levels right in the middle of flood country so she sees her fair share of water.
In the garage now ready for the mechanic ( he nos her well) in the morning
I'm used to the 3 amigos but the red light was new to me