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ELECTRICAL FAULT FINDING - ALL LAMP PANELS
Problem Possible Cause and Solution
No warning lamps or • Battery isolation switch in off position - switch on
buzzer functioning, engine • Starter battery discharged - charge
will not start or stop • Engine fuse blown - check fuse (above starter motor or flywheel housing) and
replace if necessary.
• Check for wiring faults.
Non function of warning lamp. • Disconnect switch wire to non-functioning lamp: green/blue –water temperature,
The water temperature lamp white/brown –oil pressure, brown/yellow –alternator charge. Reconnect wire
will not function unless engine temporarily to another warning lamp that is functioning; if wire switches lamp on
is overheating or there is a replace faulty lamp.
wiring fault • 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.
Water temperature warning lamp If engine is cold:
on when engine is not over • Faulty wiring, check connection and continuity (small green/blue) from switch to
temperature (Not B or C deluxe panel lamp. Ensure this connection is not shorting to earth (ground).
panel see table on following page) • Faulty temperature switch –if lamp switches off on removal of connection to switch
unit, replace.
If engine is warm:
• Switch wire connected to large sender terminal of switch/sender unit. Remove and
refit to smaller (switch) terminal.
Buzzer not functioning. • If lamp is functioning but buzzer not sounding, check connection and continuity
The buzzer will not sound for from illuminated warning lamp (red not green) to buzzer board.
green ’power on’ lamp • Faulty warning panel buzzer board - replace.
Starter battery charge lamp If tacho not functioning:
not functioning • Alternator not connected properly, check continuity of small brown wire from rear
of alternator to ‘AC’ 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
If tacho not functioning • 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 charge lamp not • Domestic battery not connected
functioning, buzzer remains • Domestic battery not connected correctly:
on with engine running 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.
Domestic charge lamp not • No second alternator fitted to engine, domestic lamp not used
functioning, buzzer switching • D+ (charge indication) lamp connection at rear of alternator not connected
off with engine running. • Two way plug and socket disconnected between engine harness and panel loom
This lamp will only function
if a second alternator is fitted
to the engine
1640_Aug_2013.qxd:beta 1660 manual 18/11/13 10:49 Page 50
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