My Lucas rectifier is the Lucas model with a sandwich of three discs bolted in line. I have a wiring diagram but it does not show what colour code goes where, many thanks.
The two yellow ones go to the alternator - doesn't matter which way round. The top red tab is connected to the earthing bolt and the blue one goes to the battery live, non-earth terminal.
Thanks but there are no colours on my rectifier ! just black.
With the original square type Lucas rectifier the 2 outer terminals are for alternator output, the green/yellow and white/green does not matter which way around.
The centre terminal of the three feeds to battery negative via ammeter if you have one. Usually brown/white.
The connection on the fixing bolt goes to earth.
If its a round disk rectifier, you can tell the correct connections via the pic:
Thanks for picture, job done.