If trouble is experienced with any of the electrical equipment it is important that the exact source is quickly located by following an orderly course of Investigation. Random probing among units of the system is useless and often incurs much unwarranted expense without locating the true source of trouble.
Trouble in the system can generally be immediately localised to a particular unit of the system by its very nature. Further localisation, In order to trace Its exact source within the faulty unit, should then be carried out by following the series of testing operations laid down under the appropriate section.
It is important to note, however, that these tests cannot be satisfactorily carried out unless the equipment recommended is available. Further, It will be seen that special equipment is needed for dismantling and reassembling some units of the system and should this equipment not be available dismantling must not be attempted.
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It is recommended that where electrical components of Lucas manufacture are installed the fullest use is made of the very extensive Lucas Service System. New units and reconditioned exchange units are always available at these Service Depots.
The electrical system is a 12 volt earth return type. It can be broken down into the following units
1. Battery.
2. Generator, voltage regulator and fuse unit.
3. Starter and starter switch.
4. Ignition system (coil, distributor and plugs).
5. Lamps, switches, direction Indicators, windscreen wipers, etc.
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