If the alarm is going off when teh sensors aren't triggering it, then soemthing else is shorting it out or the alarm itself is bad. 95- used a 3 wire alarm horn with it's own self test to make the horn chirp for a second upon start-up. Sometimes they fail and go off all the time though. The blocking diode is there to keep the FAST start system in the power pack from triggerrign the warning horn.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR
2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD 
AND THE PINK JEEP!!!! R.I.P.
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