Similar problem so threw put into this thread. I has a VS Statesman where right hand indicators blink faster than usual, checked all indicator lights outside and front indicator lamp not working, everything else on right had side working but blinking faster. Put on hazards and everything except the rhs front lamp works normally and at normal speed. So I thought - cool - found bulb had blown and replaced it with correct one. Still same problem, went and replaced flasher unit in the box under the steering wheel (nothing visually wrong with the old flasher unit), still same problem. Went hunting for loose wires under the right front bumper and nothing obviously loose.
So I had it go to the workshop anyway for something else, they found my replaced globe had blown after only a fortnight and they traced all wiring up to the dash (with a multimeter I assume) which was fine, so advised me to see auto electrician as they suspect something under the dash.
I never use it but I have a 7 pin trailer cable inside the boot. Been extremely humid and wet here but the really annoying thing is its the right hand front turn signal that people expect to see when I'm turning right at a roundabout!
Anyone else have advice or checks I can do before I donate hundreds of $$$ for an auto electrician to pull my dash apart? When I do get to auto electrician will post the answer here.