Norton Service Release Database N3/36

SERVICE RELEASE N3/36

NATURE OF RELEASE: Model 149 SA ignition and lighting switch. MODELS AFFECTED: Commando (all models) DISTRIBUTION: General Distribution (worldwide) EXPLANATION: The four terminal version of the above switch was introduced onto Norton Commando models from Engine Number 200, 000. This later switch now directly supersedes the earlier three terminal version, but will require minor wiring harness alterations and alternative wiring terminal connections. If wiring to the later standard is required Part Number 39565 three terminal version. Part Number 39784 four terminal version.   ACTION: (Quoted from February 1973 Lucas Service Information Note SI/SW/45.) When replacing a three terminal unit by a four terminal unit Part No. 39784, terminal No.4 should be disregarded. However, if it is required to modify the motorcycle to the later standard, and use the new. switch as the master unit for ignition, pilot and headlamp, proceed as follows: 1. Inside the headlamp disconnect the blue lead from the lighting switch and tape back the free end. 2. Locate the dip switch. Disconnect the blue lead at the nearby snap connector. Leave free the short lead attached to the dip switch and tape back the remaining end. 3. Connect a new blue lead (cable size 14/.610 (14/0.25mm) between terminal No. 4 of the master switch Part No. 39784 , and the free end of the blue lead attached to the dip switch. Ensure the new lead. is securely taped to the existing main harness. NOTE: The headlamp main or dip beam will still be selected by the handlebar dip switch. Februray 1973 Norton Villiers Canada Limited