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Ignition switch

Discussion in 'Norton Commando Motorcycles (Classic)' started by tyborg15, May 13, 2018.

  1. tyborg15

    tyborg15

    Joined:
    Dec 24, 2012
    I’m about to make a wiring loom for my 72 which will run trispark and a negative earth. On inspecting the old loom, I’ve found the starter motor wires and Interpol gear but I’m trying to understand why there is a 4 position master switch and a two position lighting switch. Surely if you turn the master switch to night use you wouldn’t be expected to also flick another switch so the headlight works. Am I missing something?
     
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  2. cliffa

    cliffa

    Joined:
    May 26, 2013
    Hi tyborg15, The four positions of the ignition switch are off, parking lights, ignition on, and ignition on with lights. That position goes to the switch on the headlight where you can choose side or main headlight. Then of course you can choose dipped / high beam on the handlebar switch.

    Cheers,

    cliffa.
     
    Last edited: May 14, 2018
  3. tyborg15

    tyborg15

    Joined:
    Dec 24, 2012
    Ok thanks, but what is a side headlight?
     
  4. L.A.B.

    L.A.B. Moderator VIP MEMBER

    Joined:
    Nov 20, 2004
    Sidelight.

    The term 'sidelight' is generally used for cars. It's the additional 'pilot' or 'parking' light in a motorcycle headlamp.
     
    cliffa likes this.
  5. cliffa

    cliffa

    Joined:
    May 26, 2013
    I stand (correctly) corrected:)

    Thanks L.A.B.
     
  6. rvich

    rvich VIP MEMBER

    Joined:
    Jul 25, 2009
    The next question is whether or not you want or need this set up. The low wattage parking light will keep you legal when it is required to have a head light on during daylight hours but whether or not it is bright enough to make you safe is your decision. It does help if your charging system is barely able to keep up with the needed wattage to run lights and ignition!
     
  7. tyborg15

    tyborg15

    Joined:
    Dec 24, 2012
    I don’t think I’ll use it. Laws don’t require a daytime light. I can therefore get by with a two position switch and use the light switch as a straight out on/off switch. Thanks for the help.
     
  8. 850commando

    850commando

    Joined:
    Nov 1, 2014
    the wiring was designed to meet the regulation of the day in the UK. so the park light was a circuit on its own, you could pull the key and leave the bike with the park light while in the bar for a beer or two or more, and the silly little blue capacitor would still hold the juice to get it started on points.

    the biggest battery drain is the tail light on all the time and the need for a front light (as of 1974) which pushed the alternator to its limit at lower rpm.

    I have planned a second wiring harness from scratch. the first turned out OK, it was based on using the original ignition switch but i added a 4 fuse panel . if you go to a simply of/on ignition switch you may want to think about a fuse panel with dedicated circuits for lights, signal lights, brakes lights, ignition etc and a few relays too. at which point i'd want about eight fuse slots

    also i tried to eliminate all the electrical joints possible, and ran from point to point . I used TXL wire which is very common now in american auto under the hood wiring,

    contemplate LED's for tail light and every other light which is on steady.
     
  9. Danno

    Danno

    Joined:
    Feb 7, 2010
    This is whst I just did. Got tired of replacing the crappy 4-position switch. $30 Chinese or $80 Genuwine Lucas, nothing but junk. I doubled the connections on the cold side and hooked up gauge lights, tail/brake lights, pilot light and ignition and ran the headlight lead to the hot side with a switch. All LEDs so no charging issues.
     

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