51
ELECTRICAL FAULT FINDING - C DELUXE AND B PANELS
Problem Possible Cause and Solution
Oil pressure warning lamp not functioning, • Faulty wiring - check wire connection and continuity
oil pressure gauge showing maximum deflection. (small white/brown) from sender to panel lamp.
Engine off and keyswitch in run position Ensure this connection is not shorting to earth
(ground).
Oil pressure gauge showing no movement - even • Faulty wiring - check oil pressure sender wire
when engine is started. Warning lamp functioning correctly (small white/brown) is connected.
Oil pressure showing no movement, • Check connection to oil pressure gauge, if plug is not
Warning lamp not functioning correctly connected to socket on rear of gauge, reconnect.
• If all connections are correctly made, possible faulty
sender unit - check resistance to earth (ground)
approx. 50 Ω . Replace if no reading or short-circuited.
• If adjusted correctly & buzzer still sounding, possible
faulty switch gauge unit - replace.
Oil pressure showing normal operating pressure Engine warm:
(0.75 - 5 bar). Buzzer sounding and lamp illuminated. • Incorrectly calibrated switching point for warning lamp,
adjust on rear of gauge to 0.5 bar (minimum
adjustment on gauge).
• If adjusted correctly & buzzer still sounding, faulty
switch gauge unit - replace.
Water temperature gauge showing 120°C / 250°F. Engine cold / cool:
This also applies to the B Panel with Murphy gauge • Faulty wiring, check water temperature sender wire is
not shorting to earth (ground).
• Faulty sender unit, - check resistance to earth (ground),
approx. 3.5k Ω (cold) – 0.5k Ω (warm).
Replace if notably less.
Water temperature gauge showing normal operating Engine warm:
temperature (85°C). Buzzer sounding and lamp illuminated. • Incorrectly calibrated switching point for warning lamp
This also applies to the B Panel with Murphy gauge adjust on rear of gauge to 100°C / 210°F.
• If adjusted correctly & buzzer still sounding, faulty
switch gauge unit – replace.
Water temperature gauge showing no movement, • Check connection to sender, if disconnected gauge
lamp not illuminated, engine warm. will not function.
This also applies to the B Panel with Murphy gauge • Check connection to temperature gauge, if plug is not
connected to socket on rear of gauge reconnect.
Water temperature gauge showing no movement, • Check connection to sender, if disconnected gauge
lamp not illuminated, engine warm. will not function.
This also applies to the B Panel with Murphy gauge • Check connection to temperature gauge, if plug is not
connected to socket on rear of gauge reconnect. If all
connections are correctly made, faulty sender unit -
check resistance to earth (ground), approx.
3.5k Ω (cold) – 0.5k Ω (warm). Replace if no reading.
In addition to the fault finding detailed on the previous table, the following is specific for the deluxe panel (Also
applicable for the B panel with Murphy water temperature gauge)
1640_Aug_2013.qxd:beta 1660 manual 18/11/13 10:49 Page 51
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