Fitting a 12V Audax setup
see here for the general fitting instructions
12v from a 6v dynamo explained
twee koplampen Required
  • R&M headlight bracket for handlebars (dual version) Of course you can fit your own, and you don't have to fit the lights next to each other, but I would recommend to fit them so that you can reach the switches on the fly. Do not fit the lights upside down, and non-SON users see the note below.
  • Stock SON headlight with switch (Lumotec, E6, but not the oval plus unless used in conjunction with the E6-z)
  • SON headlight in short-circuit version (E6-z)
  • Tie-wraps, 4 & 5 mm allankeys, two 10mm wrenches
r&m koplampbeugel
  • Fit the R&M bracket
  • Replace the inhexbolt by the 110mm threaded rod and the 45mm spacer
R&M koplampbeugel met Lumotec en E6
  • Fit the headlights
  • If you don't plan to connect a rear light, replace the bulb in the primairy light with one marked 3W (The short-circuit version is always supplied with a 3W bulb 
  • If you do connect a rear light, connect it to the primairy light, and retain the 2.4 bulb.
kabelboom
  • The two wiring looms are joined at the hub. If you have to fit the plugs see here for instructions
kabelboom, gemonteerd
  • The two remaining plugs are pushed on the generator. Don't worry about the joined plugs, as long as they don't get caught in the spokes.
achteraanzicht dubbele koplampen
  • Secure the wires with tie-wraps, excess lenght can be wrapped around the mounting bracket. Check that the steering or movement of the brakecable isn't impaired. Leave enough slack near the hub to facilitate (dis-)connecting.
  • The switch on the primairy light (here the Lumotec) turns on the lights
  • The switch on the secondary light (here the  E6-z) adds the high beam 
  • If the bulb in the primairy light fails, the secondary will still work. However all current is now carried by the Z-diode and turned into heat. Replace the bulb ASAP!

Note: This setup uses the fact that the SON dynamo has no connection to earth. If a connection exists from the dynamo to the frame, all lights should be isolated from the frame. For the headlights you can use a plastic bracket like the R&M, and with many rear lights it is possible to fold back the interior tab to the mounting screw.  Fit an earth-lead to the primairy headlight.