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Old 08-10-2006, 04:04 PM   #1
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Lightbulb How to Wire a New converter.... already check the other thread

Hi,
I took a look a the thread, and specially that one, becouse it is very close to my issue : http://www.airforums.com/forum...0-a-24510.html

So I have my old converter, the Univolt V, I will keep the panel fuse.
A the back of that panel, 3 wires, 2 big, one small...
One big seems to be linked to the blue and red (car batt + and trailer batt +), the other big one to the White (load - ).
the small one, wich is white, seems to be hooked up to the gray (power-on).
So if I am right,
I should hook up the + of my converter to the wire wich feed the blue and the red of the fuse panel, the - of my converter to the wire wich feed the white of the fuse panel...
but what about the 3rd small white wire pluged to the gray of the fuse panel....
Some pics to help you guys to help me...

thanks...
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Old 08-10-2006, 04:21 PM   #2
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take a 12VAC wall transformer [wallwort] (smallest you can find) plug it in next to the converter 110V supply and run one side of the output to the converter case (or other ground) and one side to the gray telltale wire. When the 110V sys. is live the transformer will power the light. The new converters don't supply a 12V tap for this function like the original did.
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Old 08-10-2006, 04:34 PM   #3
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so even if I feed the gray with the - of the converter, as it's seems to be on the old one, it won't work...
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Old 08-10-2006, 05:58 PM   #4
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I did pluged as you see on the pic...
I really want to avoid the other transformer plugged intothe outlet as I am not sure it will stand any travel...
thanks for your answers,
I know that the question was ask hundred time, but It was still kind of hard for me as I don't have a clue of wath as to be done with electrical stuff
thanks again...
david
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Old 08-10-2006, 06:35 PM   #5
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Quote:
Originally Posted by Excella CM
..... and one side to the gray telltale wire. When the 110V sys. is live the transformer will power the light...
I plugged back the converter but without the gray...
And everything works well... Happy...

So what kind of light the gray is suppose to run...
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Old 08-10-2006, 07:31 PM   #6
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ok Idid search what the gray is for,
but where is the "Power One Light"

I never saw that light... that's why I felt confused about it

was my last question....
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Old 08-12-2006, 06:46 PM   #7
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Quote:
Originally Posted by Excella CM
take a 12VAC wall transformer [wallwort] (smallest you can find) plug it in next to the converter 110V supply and run one side of the output to the converter case (or other ground) and one side to the gray telltale wire. When the 110V sys. is live the transformer will power the light. The new converters don't supply a 12V tap for this function like the original did.
I recently installed a WFCO converter/charger in my 1987 Excella. Of course I lost the power-on light on the panel. I tried a small 12VAC transformer and the light worked! But, unfortunately, it still worked when I unpluged the unit. What did I do wrong? I connected one wire to the leftover over wire from the old converter and one to the WFCO ground.
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Old 08-12-2006, 07:30 PM   #8
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The power on light is on your control panel. Its purpose is to confirm that outside AC power is powering the converter (when the audio confirmation wasn't enough ).

If you hook the small wire up to the coverter output, it will see battery voltage and light the light even when AC power is disconnected. That is the reason you need to power the small wire from a separate source. It is an easy matter when designing the converter to allow for a tap for this feature, they just don't bother. That is why you need to add a separate 12 volt source that only works when 110AC is connected. The wall wort is the simplest way to go. In theory a diode could be added to the converter output, but it would have to be capable of handling the full load-not an elegant solution.

One side of the separate transformer goes to the grey wire (light telltale) and the other side goes to TRAILER ground not converter - output. The "power on" light is connected one side to trailer ground (chassis) and the other to the remaining transformer output.
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Old 08-12-2006, 07:58 PM   #9
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I was using a wall wort, or what I think is a wall wort. It's a littler transformer that once was used to charge batteries in some now-discarded tool. It was plugged into 110 (the same plug that powers the new transformer), with one wire hooked to a small wire that previously came out of the old converter and the other wire grounded on the new transfomer. The old, unused wire obviously powered the power-on light because it was on.
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Old 08-14-2006, 10:18 AM   #10
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Anyway, that light never worked on mine, since I got the unit, so I leave it like that...
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Old 08-17-2006, 01:45 PM   #11
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use a night light

Dufferin -- forget the gray wire. Tape the end of it for safety. Buy a real small "night light" and plug it into one of your A/C sockets. Whenever the night light is on, you have your trailer connect to A/C power. Otherwise, light not on.
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