Sunbeam ALPINE I SERIES: APLINE II SERIES, Workshop Manual, Page: 329 / 413

ROOTES MANUAL WSM. 124
Section N (Elec. Equipment) Page 14A
Fig. 13. Fuse
unit
CONTROL BOX
MODEL R.B. 340
GENERAL
Equipment
We have tested and recommend the Avo Model 12
(obtainable from Avo Ltd., 92-96 Vauxhall Bridge
Road, London, S.W.I) which has been specially
designed for automotive use and enables a very
wide range of checking operations to be carried out
with a single Instrument.
Preliminary Checking of Charging Circuit
Before disturbing any electrical adjustments, exa­
mine as under to ensure that the fault does not lie
outside the control box:-
I. Check the battery by substitution or with an
hydrometer and a heavy discharge tester.
2. Inspect the generator driving belt. This should
be just taut enough to drive without slipping.
3. Check the generator by substitution or by
disconnecting the generator cables and linking
the larger generator terminal "D" to the
smaller terminal "F" and connecting a first
grade moving coil 0-20 voltmeter between
this link and earth and running the generator
up to about 1000 r.p.m. when a rising voltage
should be shown.
4. Inspect the wiring of the charging circuit and
carry out continuity tests between the gen­
erator, control box and the ammeter.
5. Check earth connections, particularly that of
the control box.
6. In the event of reported undercharging, as­
certain that this is not due to low mileage.
Note-Should the control box fail to respond
correctly to any adjustment given in the
following Instructions, It should be examined
at a Lucas Service Depot or by an official
Lucas Agent.