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Old 10-19-2014, 08:49 AM   #1
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Engine warning light

My 2002 Travel Supreme on a Mountain Master Spartan chassis with a 350 Cummins diesel warning light came on when we started up. The engine batteries were showing no signs of life so I started it with the battery boost switch that uses the house batteries. The trip lasted about an hour with no signs of a problem except for the warning light (!) not the stop light.

I am hoping that when I start it up again the light will go out. I will be checking out the engine batteries but they to have recovered most of their charge at 12.4 Volts when we stopped. I will put a charger on them to bring them to full charge over the next couple of days.

Any suggestions greatly appreciated.
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Old 10-19-2014, 09:06 AM   #2
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Question Load test is in order???

Quote:
Originally Posted by AccessMaster View Post
My 2002 Travel Supreme on a Mountain Master Spartan chassis with a 350 Cummins diesel warning light came on when we started up. The engine batteries were showing no signs of life so I started it with the battery boost switch that uses the house batteries. The trip lasted about an hour with no signs of a problem except for the warning light (!) not the stop light.

I am hoping that when I start it up again the light will go out. I will be checking out the engine batteries but they to have recovered most of their charge at 12.4 Volts when we stopped. I will put a charger on them to bring them to full charge over the next couple of days.

Any suggestions greatly appreciated.
Having the engine alternator try to charge up dead batteries is really hard on it (get really hot) and tends to shorten its life if it does not kill it. A alternator likes to maintain battery voltage and not charge them when dead. One should always try and get them charged back up with a converter with shore power, or the generator if one can't use a battery charger. Sounds like you should take the batteries out and have them load tested to determine what shape they are in would be the best thing to do at this point. If you can plug into shore power, your converter should charge them up if you have one on board?
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Old 10-19-2014, 10:05 AM   #3
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X2 on what palehorse89 said!

Just a note, the last time I had a engine light come on my cummins quit on I40 and had to be towed to be fixed. It was a sensor on the fuel pump that went out.
Yours is probably just the battery problem, but a cummins shop can put a computer code reader on it and tell you what caused the engine light to come on. I would have it checked out.
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Old 10-27-2014, 09:16 PM   #4
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Why not try reading the fault code yourself (if there is one set) from the display console? That'll save you a trip to your Cummins shop if there is no fault code set and may even alert you to a problem that you can fix yourself if there is a fault code set. If you can count the number of times a light blinks, you can determine the fault code or codes if there are more than one.
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