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Old 07-26-2016, 06:22 AM   #1
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12 Volt Power Problems

I came in yesterday afternoon and found that I had no 12 volt power, which caused the EMS to shut down. This keeps my AC and other items from running.

I have 120 volts AC to the plug circuits and microwave (secondary AC circuit) and I have 240 volts incoming to the main circuit. I also have 120 volts AC going up to the EMS circuit board, but nothing coming out.

I looked through the manuals and the wiring schematics, and am still a little confused. The manual says the wiring is protected by a breaker located in the service bay(?) on the passenger side of the coach, directly behind the battery bay. I do not see any kind of a breaker here.

Any suggestions would be greatky appreciated.

Thanks in advance for your help.

Greg

2007 Inspire 40' Genoa #51977
Bardstown, KY- Polk City, FL
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Old 07-26-2016, 09:39 AM   #2
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If your coach batteries have power but you have nothing on the interior as far as 12 volt for lights and system operation , there may be an inline circuit breaker similar to the photo below or a failed disconnect relay , you'll have to follow the positive cable from your coach batteries to find where the power stops. Look for any connector and examine it closely for power in and out.
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Old 07-26-2016, 09:45 AM   #3
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Sorry I should have attached this photo to my first post as well , these are my fuses ( 135 amp , because the gen set draws it's starter power through them) . They are on a plate on the frame , behind the battery tray , only visible from under the coach.
Left to right, starter relay , chassis battery power fuse , coach battery power fuse.
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Old 07-26-2016, 10:54 AM   #4
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Thanks for the suggestions. I found out that the problem was I had accidently hit the "salesman" switch, which disconnects all the 12 vdc circuits. Once I engaged it, everything came back to normal. I feel like a real dummy today!
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Old 07-26-2016, 12:15 PM   #5
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You've got to love the ; no cost fixes; though.
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Old 07-26-2016, 03:30 PM   #6
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Don't feel bad. We all have days like that once in a while!
Jerry
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Old 07-27-2016, 11:30 AM   #7
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Yup, I have had one of those days, and lucky that it got resolved quickly!
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