Hello all, me again,
Still trying to get my head around my RRS 2010, when the auto- lights or the head lights are demanded manually they momentarily come on bright and then dip right down. Main beam isn’t included in this process. All of this happens in 1/2 second or less
Nothing in the book for this and was just waondering why? Main beam is perfect.

It’s a self test (BIT) as Xenon lights have to be self adjusting to compensate for the load and attitude of the vehicle. Some call it ‘The dance’. 2019 5.0 SC SVA (Current)
2012 5.0 SC AB. Sadly written off by a campervan
23 plate Focus ST (Current)
1942 VEP Ford GPW Jeep (Willys) (Current)
1943 Whites M16 Halftrack (Current)
16 plate Eurofighter Typhoon, 2 x Eurojet engines with 20,000lbs thrust each. 1380mph

Thanks for clearing that up, happy now I know there isn't a fault.