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Old 09-18-2011, 12:46 PM   #1
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Bad converter?????

When camping this weekend we plugged into the campground 30 amp service and after about ten minutes or so every thing went dead except the outlets and microwave. After checking the converter I noticed both 30 amp fussed were blown. I replaced them and they blew right away. If I disconnect the battery they don't blow but we have no power except for the outlets and microwave. It is a centurion 3000. Has any one else had this issue?
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Old 09-18-2011, 01:01 PM   #2
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Had it been working fine up to that point?
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Old 09-18-2011, 01:10 PM   #3
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Yes we have not had any issues with it until then
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Old 09-18-2011, 01:51 PM   #4
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You may have a shorted cell in the battery that blows the 30 amp fuses.

The Centurion converter will not put out 12 volts until it sees voltage from a battery (I have a Centurion 4500). Have you tried measuring the battery? .... and check it isn't connected reverse polarity?
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Old 09-18-2011, 02:00 PM   #5
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Another thing you can try to test the converter. With the battery disconnected and good 30 amp fuses in the converter, connect the 7 pin to your tow vehicle. The 12 volt lights should work and when you disconnect the 7 pin from the tow vehicle the converter should stay on and power the 12 volt stuff.
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Old 09-18-2011, 02:45 PM   #6
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I connected the 7 pin the fuses did not blow but we had no 12 volt power either, would you need the battery to complete the circuit?
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Old 09-18-2011, 07:05 PM   #7
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You also need the engine on for most tow vehicles to supply power through the 7 pin. Some tow vehicles may not be set up to supply power. You don't need a battery IF the tow vehicle feeds 12 volts to the 7 pin and it seems when you connect your existing battery the fuses blow.

Here is what the cord from the trailer looks like, it may help troubleshoot and see if you do have 12 volts from the tow vehicle.
Attached Images
File Type: jpg wiring-7pole.jpg (27.8 KB, 2 views)
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Old 09-18-2011, 07:05 PM   #8
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OOPS I missed the last post sorry to repeat. Good picture, open you male end and check for power at the truck end at the 12 volt pin. I would suggest taking the battery out and get it tested then put it back in being sure it's properly hooked up and see what happens fuses are cheap. Reverse polarity will take the fuses out right away not after 10 minutes that's why I wondered if it had problems before all this. All of your 120 volt stuff will continue to work even if the lights, water pump, etc don't the converter/charger only supplies 12 volt power the same stuff that normally works when it's not plugged in. Are these the main fuses or ones in the converter? Depending on your 7 pin hook up your truck may have to be on or it may not even be wired to supply 12 volts to the camper most newer factory towing set ups are wired but if it's an add on it may not be if you don't have truck power it's very possible you would never know because you battery would have been charged with city power. I'm leaning towards the converter because every thing had been working fine.
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Old 09-18-2011, 07:53 PM   #9
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Thank you all for the great replies. I took the battery to our local part store and they tested the battery and found a bad cell. I will return to the camp ground in the beginning of the week and put the new battery in and see if it solves the problem I will make sure I let you know how I make out thank you again
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Old 09-19-2011, 12:12 PM   #10
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Glad to see you found something .... even though it will cost to fix it. Do let us know, it may help everyone.

Welcome to the Sunline Club Kenneth, I just realized this was your first posts.


mainah, looks like you and I posted at the same time, great minds think alike.
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Old 09-22-2011, 04:54 PM   #11
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update..... after all the trouble shooting and new battery the fuses just kept blowing, so I ended up installing a new converter today and now every thing is working well. Thank you for all of your help.. I hope this post helps others.....Happy camping every one...
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Old 09-23-2011, 05:52 PM   #12
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Quote:
Originally Posted by Gene View Post
Glad to see you found something .... even though it will cost to fix it. Do let us know, it may help everyone.

Welcome to the Sunline Club Kenneth, I just realized this was your first posts.


mainah, looks like you and I posted at the same time, great minds think alike.
Yeah but you were first good job!
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