When the hazards are turned on there is an internal connection in the stalk (see the switch representation in the diagram above) between the output from the flasher relay (stalk terminal 49A) and both the left ("L") and right ("R") indicator outputs, so the fact that the right indicators work when the hazards are turned on is OK.

If you unplug the stalk and switch the right indicators on, have you got continuity between stalk terminals "R" and "49A" ? You should have with the indicator on. If not, suspect a dodgy connection inside the stalk. (I think you'll find it's OK - see thoughts below).

Re: the brown/white wire - when you say the right indicator works if you put it on "85", do you mean if you put 12V onto the wire, then the indicators work (flash) correctly ? Is the wire to/from a relay in the fuse box ?

I'm wondering if this wire is an original power feed wire to the original flasher relay in the fuse box (equivalent to the wire between terminals "49" in my diagram above), but you've added your own flasher relay outside the fuse box, so what you've done is route the right indicator output wire from stalk terminal "R" to the original flasher relay in the fuse box instead of directly to the indicators. However, as the original flasher relay doesn't any longer have a power supply after you've re-worked your loom, then the flasher relay doesn't work, resulting in no right indicators (unless of course you do provide power to the superfluous flasher relay via the brown/white wire). (see representation below for how I think your wiring currently is)



Where does your wire from stalk terminal "R" go to ? I bet it doesn't feed the right indicators directly as it should, but runs to the fuse box. You should have continuity between stalk terminal "R" and one of the wires at the bulb holder for any of the right hand side indicstors.