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Old 01-24-2012, 04:19 PM   #1
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Onan 7500 generator won't start.

I replaced my house 6 volt house batteries and now I can't get the generator to make a sound. It started slowly before I replaced the batteries but at least it did start. This is in my 2004 Coachman Cross Country. I 've put a meter on all of the fuses I can find and they are all good. Does anyone have any ideas? It is diesel.
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Old 01-24-2012, 04:38 PM   #2
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With a voltmeter, make sure you have 12V at the starter solenoid right at the Generator. If you do, then press the start button and see if the solenoid "clicks"....starter should run. Rook
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Old 01-24-2012, 04:41 PM   #3
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Did you put the batteries in series? Minus to plus. Get a flashlight and look carefully to see if you left off the generator lead.
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Old 01-24-2012, 04:57 PM   #4
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Checked out the generator leads and they are connected.
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Old 01-25-2012, 05:48 PM   #5
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Since you were having problems BEFORE you replaced the batteries, you may have a failure on one of the cable ends, running from batts to gen. Remove, clean, check, wiggle, carefully. If they are crimped on, and covered with shrink sleeves, the bad connection may not be readily visible. And, they may check Ok with a meter, but, when you hit them with the demand of a starter draw, the bad, aka, high resistance connection will not allow sufficient current to pass, and start the machine....
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Old 01-26-2012, 02:08 PM   #6
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Thanks, that suggestion will be my next step. If it works, I'll be back in touch!
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