Capability of RX8 BEC

I have a RX8 comb in my Summit.
I noticed that when I turn the steering the LEDs on board become dim temporarily.
The steering servo is Savox savox sc-1256tg (20kg, 0.15sec, stall current:5A) .
Is this an evidence of over current of the servo?
Should I use an external bec?

[What's_nitro?]

Could be binding in the steering mechanism. Do the bellcranks hit the end of their travel before the servo does?

Nope. I have checked that.

[What's_nitro?]

The RX8 has a max. 5A BEC output so the servo might be overdrawing the BEC for a short time. Try plugging a capacitor into the Rx. Something like 10V and 1000uF should help if that is the issue. If you don't feel like making one, there's the Novak Glitchbuster.

I've tried a capacitor of 4700uF (ASSAN, IIRC) and barely noticed the difference.
Maybe I will try to use an external bec.

[What's_nitro?]

If you try the external BEC, don't forget to remove the red wire from the Rx plug on the RX8. If that works, maybe you have a defective servo or a (slightly) defective BEC in the RX8.