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Old 08-03-2013, 05:12 PM   #1
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Angry ISL audible alarm

I have a 06 Holiday Rambler Scepter with the Cummins ISL engine. I often have an audible alarm in the dash go off after starting down the road and continuing for indefinite periods. The alarm goes off when I turn the key ON and soon goes off after actually starting the engine. After being on the road for some time the alarm will often begin signaling again. The alarm has 4 wires going to it. An IGN wire goes to one terminal and 3 wires with in line diodes go to the other terminal The other 3 wires are marked water temp, oil press and alt charge. I believe that the alt charge signal is on until the engine is actually started when it then stops alarming. I now need to find out if/when the oil and water signals are being sent to cause an alarm. Could someone tell me the physical location of the oil pressure and water temp sending units. Also do you know the operating ranges of the two units. Water ? to ? Fahrenheit and ? to ? Oil Pressure. Thanks for any help in this regard. Not a lot of help from Monaco with wiring diagrams either. Self taught learning experience on most of this. Not paying myself $100+ an hour to learn however.
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Old 08-04-2013, 06:59 PM   #2
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I am not familiar with your coach to know what chassis manufacturer you have. One suggestion I have is to disconnect one lead at a time to id the alarm. Once that is determined contact Cummins and give them the SN of your engine. They will sell you the correct sensor and tell you where it is on your engine. Sensors do give false alarms. Remember. Always KISS a problem. Keep It Simply Simple.

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Old 08-07-2013, 06:48 AM   #3
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Have you checked the level of the hydraulic fluid in the jack reservoir? It may be using one of those other inputs as a signal.
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