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Dashboard indicator tell tale not working. So far I have checked:
Bulb, all wiring for continuity to both tell tale bulbs. All work / have continuity.

All exterior indicator bulbs work Ok but of course with the dash tell tale not working on the RH, it will fail an MOT.

Any ideas please?

One suggestion is a failed blocking diode. There should be one each for left and right indicator lamps. Not having a series 3, I can't offer a suggestion where they are located but logic suggests the wiring close to the indicator lamps. Mike.

all sorted - poor bulb connector contact. The real problem was that I was checking the wrong bulb!! Sorry folks.