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post #1 of Old 04-14-2008 Thread Starter
sapadeni
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Low Oil Pressure buzzer/alarm

Hello,

I have a 1985 O'Day 28 with a Universal model 5411 diesel. The low oil pressure indication on this boat is only a small red light on the ingnition panel, which is almost impossible to see on a sunny day. In attempt to be proactive, I wire a radio-shack buzzer in parallel with the inidicator light, and voila! nothing. The light is definitely lit when I turn on the ignition key so I know there's power in the circuit coming from the low oil pressure switch on the block. Could it be that the voltage to the indicator light is much less than 12 volts and that's why the buzzer won't work? The buzzer that I bought is rated at 9-16 volts DC. Admitedly I'm no electrictian, but I checked the wiring schematic and it seems like all the wiring to the panel would be 12 volts. I tried the buzzer to an adjacent gauge and it worked fine. Any thoughts???
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