Back indicator - fuse or bulb ?

Hi,

We've been experiencing more and more issues with our beloved Freelander sport TD4 2005.
On and off recently we've had rear indicator issues. This was fixed in the past but i'm not sure what the garage had done to fix it.
basically, the indicator (left) makes that very fast noise, with quick flashing faint light. Other times the sound is normal speed again (but i'm not sure whether the light would appear ok - well it did appear once in the past so I assume it did)

Now I checked this morning, and well, now the fast tick tock noise is back but no light at all. All the other lights seem to work.
I know that the casing around that indicator is cracked at the top (not sure if part still exist to replace it, or whether it's caused the issue with rain etc?). Would a place like Halfords know what to do ? I can't afford hundreds of pounds on this, but equally going left is pretty dangerous for us (and other drivers).

thanks for your help !

Sounds like the bulb if not ir could be a little bit of corrosion either way you need to remove the light to sort it, they are still available or try a scrap yard.

Hi Artic, thanks for your reply When you say corrosion, you mean on the bulb or fuse ? (i know nothing about mechanics lol). thanks for the link too ! How do mechanics diagnose this? would like to avoid someone having to run diagnostics for £100? Would Halfords or ATS be able to check do you think ?

As Arctic says… check the bulb/s first.

The double-time flashing shows there is a problem. Normally it’s a blown bulb. If the bulbs are proven working, then check/clean the bulb holder and try again.
If none of that works, it potentially could be the relay or a wiring fault, but try the first 2 above first.

P.s. you haven’t put led bulbs in or something silly, right?

If only one of the indicators isn't working, then it's a bulb or it's connection. It won't be a fuse, as the indicators aren't fused independently.