Indicator tell tale not working - xj6 series 3

[CliveRothwell]

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?

[mike020150]

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.

[CliveRothwell]

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