Corsa C indicator issue

Have an issue with the indicators on a Corsa C, 2002



left side flashes a lot faster than the right. Now before we all jump at the conclusion that a bulb is blown, all bulbs on both side are fine.



So i swapped the indicator relay out form two cars from a scrappy and still the same issue. I also swapped the front and back bulbs from the right side to the left side and still the same problem. Just the right side on its own flashes at normal speed, hazards flash at normal speed, left side flashes a lot quicker.



Running out of ideas now. If it's not the relay, not the bulbs, what are the other options?

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