TT,
the snippet is from the latest IVA manual, which I downloaded today.
See my post:
http://www.haynes.co.uk/forums/showp...8&postcount=10
The version/date on the snippet is not the current manual's version and date, since the section the snippet has been taken from has not been updated since its rev. 3 29/6/2009.
Since it maybe a couple of years until I submit my build for IVA, I intend to fit them, (I have a pair in the garage and have included the necessary wiring on my wiring diagram) as I suspect they will become mandetory in the near future.
OT: Did you see my questions for you in this post?
http://www.haynes.co.uk/forums/showp...0&postcount=15