Ever since my battery died on my 2001 disco 2, I've heard this clicking noise. It started after I replaced the battery and it clicks when the engine is off. I can't pinpoint where it's coming from. Some have said it is the ABS.
My battery was completely dead and the car was double locked. The only way for me to gain entry was to break a window. Well I'm back in the car with a fresh battery, then this clicking noise started.
Any thoughts??

 

You just did not notice it before. It is related to obscure unpublished secrets from the ABS manufacturer.
What you hear is this waveform at bottom that I was concerned when first acquired the Disco.

Checked ABS noise waveform on oscilloscope, rescued this image from my files but cannot make it brighter. Perhaps someone can and re-post more readable.

---> https://landroverforums.com/forum/di...co-box-101146/
---> https://landroverforums.com/forum/di...ery-tsb-76356/

 

The faint noise from the ABS pump is completely normal, 24/7.

 

Do you have air suspension (aka SLS) ? Or was SLS originally on your truck and removed? If so that could also be it

 

Removed a long time ago