Oil Pressure Alarm does not work
I have Ford Lehman 120’s in my 42’ G.B.. When I turn the engine switch to the “on” position prior to start my starboard engine alarm fails to sound. The alarm on the port engine works fine. The problem just recently occurred. Any suggestions on diagnosing the system?
It appears that there are two sensors or switches attached to a tee which is fed from engine galley oil. Both units have zero resistance when the switch is off. When the switch is on the larger “sensor” reads 9 volts while the smaller “sensor” reads 1.5 volts. Thoughts?