Had a bit of bother the other day, black smoke coming out of from under bonnet, turned out to be the klaxon for the alarm, next to the battery box under the fuse box, 2001 4.6 thor, in case they are different.
Turns out there are rechargeable batteries in it , so worth a check.

Hi all, just came across this doing a search and seems a good site.
I have a P38 Holland and Holland and a disco td5,had a few Classics petrol and diesel. Do all the work myself, so hope I can be of some use...
I have a hawkeye with P38 , TD5 defender and td5 disco on it
Live Tyneside way