Beta Marine Beta 10 Operator's Maintenance Manual page 38

Electrical Fault Finding - All Lamp Panels
Problem
No warning lamps or
buzzer functioning, engine
will not start or stop
Non function of warning lamp.
The water temperature lamp
will not function unless engine
is overheating or there is a
wiring fault
Water temperature warning lamp
on when engine is not over
temperature (Not B or C deluxe
panel see table on following page) • Faulty temperature switch –if lamp switches off on removal of connection to switch
Buzzer not functioning.
The buzzer will not sound for
green 'power on' lamp
Starter battery charge lamp
not functioning
If tacho not functioning
Domestic charge lamp not
functioning, buzzer remains
on with engine running
Domestic charge lamp not
functioning, buzzer switching
off with engine running.
This lamp will only function
if a second alternator is fitted
to the engine
Possible Cause and Solution
• Battery isolation switch in off position - switch on
• Starter battery discharged - charge
• Engine fuse blown - check fuse (above starter motor or flywheel housing) and
replace if necessary.
• Check for wiring faults.
• Disconnect switch wire to non-functioning lamp: green/blue –water temperature,
white/brown –oil pressure, brown/yellow –alternator charge. Reconnect wire
temporarily to another warning lamp that is functioning; if wire switches lamp on
replace faulty lamp.
• Disconnect positive feed to non-functioning lamp. Reconnect temporarily with wire
from another warning lamp that is functioning, if wire switches lamp on rewire with
new connection.
• If none of the above, check continuity of connections from panel to engine.
If engine is cold:
• Faulty wiring, check connection and continuity (small green/blue) from switch to
panel lamp. Ensure this connection is not shorting to earth (ground).
unit, replace.
If engine is warm:
• Switch wire connected to large sender terminal of switch/sender unit. Remove and
refit to smaller (switch) terminal.
• If lamp is functioning but buzzer not sounding, check connection and continuity
from illuminated warning lamp (red not green) to buzzer board.
• Faulty warning panel buzzer board - replace.
If tacho not functioning:
• Alternator not connected properly, check continuity of small brown wire from rear
of alternator to ' A C' position on keyswitch.
• Alternator connected properly, faulty alternator - replace
If tacho functioning correctly:
• Check continuity of small brown/yellow wire from rear of alternator to no charge
warning lamp on rear of panel.
• If alternator connected properly, faulty panel warning lamp - replace
• Check connections on rear of tacho, especially black/blue wire, terminal '4'
• Check connection of black/blue wire on rear of 1st alternator (W connection, usually
a bullet on flying lead, or lowest connection on alternators with 3 pin coupler)
• Check continuity of black/blue wire from alternator to tacho
• Measure voltage from alternator W connection to earth (ground), should be
approx. 7.5 - 9.0 volts AC
• Domestic battery not connected
• Domestic battery not connected correctly:
B+ to domestic isolation block on starboard rail (port on 75 - 95hp)
B- to engine earth (ground)
• Domestic battery flat
• Panel relay faulty / incorrectly wired: Check voltage at relay terminal 86, white wire
is positive feed for warning lamp from AC position of keyswitch.
• No second alternator fitted to engine, domestic lamp not used
• D+ (charge indication) lamp connection at rear of alternator not connected
• Two way plug and socket disconnected between engine harness and panel loom
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