Rewiring my 99 Dominator which at some point has been converted to 12v and a modern ish regulator/rectifier fitted. The Haynes wiring diagram is very poor to say the least, there appear to be wires going to nowhere on it, ie alternator to terminal 7 on the switch?
I’m guessing where the alternator and regulator wires go to, so I wondered if anyone had a proper diagram I could follow, which would reflect the new 12v and electronic regulator layout?
More information would help, what year is it ?, mag or coil ignition. With modern regulation there is no need for a switch in the charge system ,do you have an ampmeter?.
... is probably what that wire from the alternator is for. For normal running only 1 charging coil is used; with lights on the others 2 are brought in.
If you have a modern reg/rectifier then I'd expect the alternator wires to be connected as if it was a 2 wire one
Sorry it is a 59 Dommie, it appears that two of the three wires out of the alternator are joined to provide 12v? The third wire is connected to the 7 terminal on the switch, which as far as I can find out, isn’t connected to anything according to the Haynes manual?
hello Now Lucas RM21 are two wires so scrap yellow and green nearly all wires on a Norton are Negative wire as the Frame is live, Postive red wire to frame 1959 model were coil ignition and therefore have the PRSA8 switch in the headlamp so work things out from there yours anna j
Please ignore above words from AJD as they are useless and confusing.
12V reg/rectifiers, these have 2 (mostly YELLOW) in put AC wires, these are fed from the alternator which is converted into a two wire by connecting the GREEN/YELLOW to GREEN/BLACK the other alternator wire is the WHITE/GREEN. If you started with the previous 3 colours then your stator would MOST LIKELY is an RM19 which was made for 6V but can easily supply 12V.
Once you have gone to 12V then the alternator no longer has any connection to the PRS8 as the regulation is fully done by the Zener or the Reg/Rect. The stator feeds the (2YLW) Rec/Rect (or Rectifier and Zener, while the output of said has Positive to Earth and Negative to the Amp-meter for battery charging. The DC from the Amp-meter (same terminal) then feeds the DC side of the PRS8 or similar light switch. ALL British alternator bikes with coil ignition follow this system.
Remember the battery supplies the coil ignition and the lights. the bike is fully functional as per and you will travel up to 100 miles before the battery goes flat-THEN and only then does the need for battery charging-alternator /rectifier etc have to be in good order to keep the battery charged.
I sell these reg/rects see aoservices.co.uk
Thank you Alan, that’s what I needed to know.
Yes I have the colour wires that you mentioned, and the PRS8 switch, so I’ll give it a go over the weekend and let you know the result.
Many thanks, Tim