There have been various discussions here on the Ace Lucas wiring diagram. I have been musing over the one I have.
Titled as follows: Lucas Electrical Equipment A.C. "Ace" Sports Cars (1955-57) Home and Export Models
Information boxes as follows: Wiring Diagram No. W29340A Supersedes W29340 which should be destroyed
And: Issued March 1957
I suppose this diagram covers most Aces, except that there is an existing post by Keith Lessiter which references a different diagram as follows:
Wiring Diagram for 1956/1957 Ace Home & Export Models
reference no. W31520A issued February 1957
(supercedes W31520)
All this is rather academic unless you are trying to get the wiring as original. Firstly both these suffix 'A' diagrams supersede an earlier version and both cover dates which do not go back to the first years of Ace production. Again does this really matter ? Well apart from from originality I think it does as, at least in the case of AE 22, the components do not match the diagram. For example rather than supplying an earth, to activate the live horn circuit, the horn push controls a horn relay. Easy enough to make up the required circuit, but not so easy to get the cable colour code original without the relevant diagram. Next question would be at which Car No. did the horn relay get deleted ?