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batteries are exhausted.
This, in turn, may be due to the dynamo failing to charge the batteries, and the final cause of the
trouble may be, perhaps, a loose connection in some part of the charging circuit.
If, after carrying out an examination, the cause of the trouble is not found, the equipment should be
checked by the nearest Lucas Service Depot or Agent.
CHARGING CIRCUIT
1. Batteries in low state of charge
(a)
This state will be shown by lack of power when starting, poor light from the lamps, and
hydrometer readings below 1:200. It may be due to the dynamo not charging or giving low or
intermittent output. The ignition warning light will not go out if the dynamo fails to charge, or will
flicker on and off in the event of intermittent output.
(b)
Examine the charging and field circuit wiring, tightening any loose connections or replacing
broken cables. Pay particular attention to the battery connections.
(c)
Examine the dynamo driving belt; take up any undue slackness by swinging the dynamo
outwards on its mounting after slackening the attachment bolts.
(d)
Check the regulator setting and adjust if necessary.
(e)
If, after carrying out the above, the trouble is still not cured, have the equipment examined by a
Lucas Service Depot or Agent.
2. Batteries overcharged
This will be indicated by burnt-out bulbs, very frequent need for topping up the batteries, and high
hydrometer readings. Check the charge reading with an ammeter when the car is running. It should be
of the order of only 3-4 amperes.
If the ammeter reading is in excess of this value, it is advisable to check the regulator setting and
adjust if necessary.
STARTER MOTOR
1. Starter motor lacks power or fails to turn engine
(a)
See if the engine can be turned over by hand. If not, the cause of the stiffness in the engine
must be located and remedied.
Fig. N. 16 Removing a tail lamp bulb
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