23
PROBLEM
POSSIBLE CAUSE & SOLUTION
Oil pressure warning lamp not functioning, oil
pressure gauge showing maximum deflection.
Engine off and keyswitch in run position
• Faulty wiring –check wire connection & continuity (small white/brown) from sender
to panel lamp. Ensure this connection is not shorting to earth (ground).
Oil pressure gauge showing no movement -
even when engine is started. Warning lamp
functioning correctly
• Faulty wiring –check oil pressure sender wire (small white / brown) is connected.
Oil pressure showing no movement, Warning
lamp not functioning correctly
•
Check connection to oil pressure gauge, if plug is not connected to socket on rear of
gauge reconnect.
• If all connections are correctly made, possible faulty sender unit –check resistance to
earth (ground) approx. 50W. 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 (0.75–5 bar). Buzzer sounding &
lamp illuminated.
Engine warm:
• 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
THIS ALSO APPLIES TO THE B PANEL
WITH MURPHY GAUGE
Engine cold / cool:
• Faulty wiring, check water temperature sender wire is not shorting to earth
• Faulty sender unit, –check resistance to earth, approx. 3.5k
Ω (cold) – 0.5kΩ
(warm). Replace if notably less.
W
ater temperature gauge showing normal
operating temperature (85°C). Buzzer
sounding & lamp illuminated.
THIS ALSO APPLIES TO THE B PANEL
WITH MURPHY GAUGE
Engine warm:
• Incorrectly calibrated switching point for warning lamp, adjust on rear of gauge to
100
°C.
• If adjusted correctly & buzzer still sounding, faulty switch gauge unit – replace.
Water temperature gauge showing no
movement, LED not illuminated, engine
warm.
• Check connection to sender, if disconnected gauge will not function.
•
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,
approx. 3.5k
Ω (cold) – 0.5kΩ (warm). Replace if no reading.
ELECTRICAL FAULT FINDING – C DELUXE & WATER TEMPERATURE FUNCTION
ON B PANELS
In addition to the fault finding detailed on the previous table, the following is specific for the C Deluxe type deluxe panel (Also
applicable for the B panel with Murphy water temperature gauge)
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