brake bulb holder fixed 3 amigos

Hi folks. Just thot I'd post this up in case it helps anyone. I've had the 3 amigos twice before and turned out to be broken rings on the drive shafts. But a few weeks ago they popped up again but this time with a twist. They would go out after I reached 8 or 9 mph, just like the abs light does normally ( 2001 td4 ) and seemed to come on only as I pulled up to junctions. I checked all the speed sensors and rings and hdc switch. All ok. Then thot it may be the brake pedal switch ( 3 wire ) so ordered one. But before it arrived I went to change a tail/brake bulb and saw the holder was corroded badly. Changed the bulb holder and no more 3 amigos. Ive never heard of this before but its been amigo free for 2 weeks now.
I hope this helps somebody who like me waa stumped.
All the best folks....mitch

On a Td4 then the ABS warning light goes off after bulb check (unless there's a fault)

It's the pre 01MY system where the ABS light goes off after 5MPH and not before.

It could be the corroded bulb holder was back feeding the ABS system with voltage it wasn't expecting and causing the error to flag