The indicator's circuit is much more complicated than the headlamps circuit, there is a flasher relay and the MFU both involved... if you dont get any activity at all when you move the stalk both ways then that's a good point to start provided the indicators are working on hazard switch command... if they dont work on hazards either then better start with the flasher relay, presuming you checked the fuses
My friends call me Fery
2000 Discovery Td5 ES manual
Hawkeye v.6, Nanocom EVO,
VDM UCANDAS, oscilloscope
if you think my english is peculiar it means you didnt hear my japanese
ALL MY ADVICES ARE BASED ON MY OWN KNOWLEDGE AND MY WAY OF UNDERSTANDING THE DESCRIPTION AND OPERATION OF SYSTEMS... I'M NOT A LAND ROVER TRAINED SPECIALIST JUST AN ADDICTED ENTHUSIAST.