Error DRL

[kincop]

Hello!

Both of my daytime running lights (the 21W wire on the W21/5W bulbs) are completely dead, both in Auto on and Auto off mode.
The sidelights (the 5W wire) work perfectly on both sides. In the trip computer, the car warns in two stages: "Right sidelight out of order" and "Right daytime running light out of order" (it only warns for the right side even though both daytime running lights are completely out).
The original factory-fitted lights are still in the car. A mechanic has looked at them and confirmed that the bulbs are physically intact. I have also checked fuse 41 myself and switched place with the gray relays (6 and 8) in the engine compartment without result.

Can anyone knowledgeable guide me in the right direction in further troubleshooting?

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[Rusty2009]

Daytime running lamp is fuse 8 & 9 on glovebox fuse board.

But this also controls the dipped beam for each side.

Relays are KR42L & KR42R in the engine bay board.

I would check the BCM to make sure it hasn't got wet (or any water damage etc). Also the ground point.

Also although a bulb looks ok it can still be at fault same as a fuse.

[Big Dave2]

My gut feeling is both DRL bulbs are duff and need replacing.