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Old 05-23-2012, 10:29 AM   #15
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as bluepill offered up, try a 7 or 7.5 A slo blow fuse. Check Radio Shack or other Electronics stores (electronics, not electrical). Once you replace the fuse if still no 12V, as Ron2 suggested, run an extension cord from the house/garage and plug the convertor into it to bypass the RV 110V system. If still no 12V output from the convertor, there is definitely an issue with the convertor.
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Old 05-23-2012, 11:39 AM   #16
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There are basically 2 electrical systems in an RV. The 110 volt AC system that you are plugged into when you plug into the pedistal with your drop cord.This will operate the microwave, tv, dvd player, etc just like in your home.Then there is a 12 volt DC system that operate lights, bathroom fan, furnace and sometimes the fridge circuit board. There are 2 systems so you can be away from shore 110 AC and boondock without losing everything.The only place they are connected together is ground which is not important to your problem and the converter which simply charges your 12 volt battery when plugged into shore power. Not having a converter will not prevent your battery from electrifying fans and lights as long as the battery is charged. If lights don't work the first thing to check is the battery. Does it output about 12.8 volts? If yes, your battery is charged and should light the lights. If no, charge battery and try again after charging is complete.

Once you determine your battery is good, you will have to find if +12 volts is at the fuse panel. Remember, 12 volts DC uses fuses, 110 volts AC uses breakers in a panel just like a modern house electrical system. It's your 12 volt system here that's not working right.

My guess is that you have a disconnect between the battery and the +12 volt fuse panel or you have a bad -12 volt battery connection to the frame or battery. Either way power is not getting to the lights. Remember that the converters job is simply to charge the 12 volt battery when plugged into shore power. It actually does not matter that it works or not as long as the battery is charged.

You need a simple test light or better yet, a volt ohm meter commonly called a multimeter or VOM for testing electrical systems. Once yo have one set your meter to the DC scale and sleuth out the + 12 volt side of things like battery at converter cable and fuse panel and at the light itself.IF you have =12 volts at the fuse panel and on either side of the fuses and it still doesnt light a light the problem has to be on -12 volt side. (frame, battery terminal connection, - 12 volt buss) Color convention in 12 volt systems is black or any color besides green or white is +12 volts. White or green is -12 volts. That is almost always the case except at the battery terminals in which case they are both generally black. Sometimes the loom covering the wire at the battery is color coded. If you get confused as to weather it's + or - the meter will tell you by reading the correct voltage but with a - sign in front of the reading. telling you the leads are reversed.or just look next to the battery terminals for a + or - sign.
Good luck and keep us posted your results. 12 volt systems are super simple. I have little doubt you will find the problem in short order.
-Paul R. Haller-
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Old 05-23-2012, 12:39 PM   #17
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as bluepill offered up, try a 7 or 7.5 A slo blow fuse. Check Radio Shack or other Electronics stores (electronics, not electrical). Once you replace the fuse if still no 12V, as Ron2 suggested, run an extension cord from the house/garage and plug the convertor into it to bypass the RV 110V system. If still no 12V output from the convertor, there is definitely an issue with the convertor.
There is not a RadioShack within 30 miles of here. So we are just going to wait for the fuse to come in and see if that works. I'm 100% positive the fuse is blown. The metal coil in the middle was fried in half. And then while removing it we broke the glass surrounding it so ther is no way it will work.
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Old 05-23-2012, 12:47 PM   #18
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There are basically 2 electrical systems in an RV. The 110 volt AC system that you are plugged into when you plug into the pedistal with your drop cord.This will operate the microwave, tv, dvd player, etc just like in your home.Then there is a 12 volt DC system that operate lights, bathroom fan, furnace and sometimes the fridge circuit board. There are 2 systems so you can be away from shore 110 AC and boondock without losing everything.The only place they are connected together is ground which is not important to your problem and the converter which simply charges your 12 volt battery when plugged into shore power. Not having a converter will not prevent your battery from electrifying fans and lights as long as the battery is charged. If lights don't work the first thing to check is the battery. Does it output about 12.8 volts? If yes, your battery is charged and should light the lights. If no, charge battery and try again after charging is complete.
Yes. We did buy a tester and checked and it is putting out 12.6 v. It's a brand new battery. We had power all the way until that fuse which was blown. And no output past that.
Quote:

Once you determine your battery is good, you will have to find if +12 volts is at the fuse panel. Remember, 12 volts DC uses fuses, 110 volts AC uses breakers in a panel just like a modern house electrical system. It's your 12 volt system here that's not working right.

My guess is that you have a disconnect between the battery and the +12 volt fuse panel or you have a bad -12 volt battery connection to the frame or battery. Either way power is not getting to the lights. Remember that the converters job is simply to charge the 12 volt battery when plugged into shore power. It actually does not matter that it works or not as long as the battery is charged.

You need a simple test light or better yet, a volt ohm meter commonly called a multimeter or VOM for testing electrical systems. Once yo have one set your meter to the DC scale and sleuth out the + 12 volt side of things like battery at converter cable and fuse panel and at the light itself.IF you have =12 volts at the fuse panel and on either side of the fuses and it still doesnt light a light the problem has to be on -12 volt side. (frame, battery terminal connection, - 12 volt buss) Color convention in 12 volt systems is black or any color besides green or white is +12 volts. White or green is -12 volts. That is almost always the case except at the battery terminals in which case they are both generally black. Sometimes the loom covering the wire at the battery is color coded. If you get confused as to weather it's + or - the meter will tell you by reading the correct voltage but with a - sign in front of the reading. telling you the leads are reversed.or just look next to the battery terminals for a + or - sign.
I'm thinking it must be the blown fuse since the battery is fully charged and hooked up correctly and we did get a good reading on it at the fuse panel before the blown main fuse inside the box. Thanks for the useful info though. It's a learning curve to say the least! So it surely will not still work the lights etc with the main fuse out of the converter. Like I said it is blown PLUS now we broke it removing it.
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Good luck and keep us posted your results. 12 volt systems are super simple. I have little doubt you will find the problem in short order.
-Paul R. Haller-
Wow you really don't know me at all do you? Lol! I tend to make things that should be very simple extremely difficult and time consuming!
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Old 05-24-2012, 10:43 PM   #19
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So to be clear, if we do not get power back up through the converter wie will not be able to have any lights with shore power because it must go through it? I' electronically challenged remember lol!
I'm gonna answer my own question here cause today we were able to hook our camper up to the house and guess what!!!!!! Everything worked!!!! Yay!!!! So with or without the converter working we still have all lights and outlets running! Hopefully the new fuse which we ordered will be here before we leave so we can get that fixed bit even if it isn't my mind is at ease knowing we will have power to the entire camper with shore power! Call me happy today!
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