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Old 07-19-2010, 11:16 AM   #15
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Do you always have 12 volts at the Blue terminal?
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Old 07-19-2010, 11:23 AM   #16
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Romer,
If you have 120 volts at the converter when plugged into shore power and when the generator is running then the problem is on the 12 volt side. The two places where the problem can be is either from the batteries to the converter or the converter itself. Can you find a wire at the converter that goes(directly) to the batteries?

On Edit: The wire you are looking for should be a large gauge wire(#8 or #10).
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Old 07-19-2010, 11:29 AM   #17
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Do you always have 12 volts at the Blue terminal?
You know, never checked there. I've only checked for 12v at "C" and "D" since that seemed to be supply point.

Not at MH today, but will have it home tomorrow and can check there, but wouldn't the blue terminal be after terminal "C". i.e nothing at "C" means nothing at Blue?

By the way,

Thanks so much for all your help and time.
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Old 07-19-2010, 11:37 AM   #18
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I have a hunch that the blue wire is connected to the relay which is internal to the converter and which I think is defective but I can't say for sure until we make sure the wire and connection from the battery to the converter are all good. The wire you are looking for from the battery will be larger than #8 or #10 since it has to carry the total load of the rv when not connected to shore power.
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Old 07-19-2010, 12:02 PM   #19
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I have a hunch that the blue wire is connected to the relay which is internal to the converter and which I think is defective but I can't say for sure until we make sure the wire and connection from the battery to the converter are all good. The wire you are looking for from the battery will be larger than #8 or #10 since it has to carry the total load of the rv when not connected to shore power.
The only connections I've seen are the 10ga. to terminals "C" & "D". If there's anything larger, it has to be internal.

Will check all this out tomorrow.
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Old 07-20-2010, 04:54 AM   #20
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Have a 94 Adventurer with a magnetek 7345RU convertor. Last week DW was running on generator and cleaning MH. Genny died as did all of our 12v. House batteries are fully charged. Replaced battery disconnect switch and relay. still no 12v. However, if I turn on ignition switch I do get 12v and can even start generator, which will run for about 45 minutes and die. If I use disconnect switch, I can stop generator immediately. Start engine and then I can restart generator. Also, connecting shore power gives me 12v and ability to start generator. With generator or shore power have 12v at battery posts on the magnetek, otherwise no 12v.

What am I missing that I haven't looked at? I should have 12v everywhere as long as I haven't used disconnect switch, shouldn't I?

TIA,

Merrill
Merrill,

I just had that happen on my 2001 and it was a 50 Amp breaker between the batteries and the converter. It popped durring shutdown of the generator. On mine it is located near the two battery disconnect and bypass relays. Start at the batteries and work your way toward the converter. Follow the power starting at the batteries and you will find out where the path is broken.
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Old 07-20-2010, 11:38 AM   #21
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Many thanks to both RJay and Neil.

Found it, a popped 40amp breaker buried under all the under dash wiring about 6" away from all the fuses. Don't know why they couldn't put it somewhere easy to see.

At least I now have a new battery disconnect switch

thanks again everyone.

Merrill
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Old 07-20-2010, 03:37 PM   #22
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Don't know why they couldn't put it somewhere easy to see.
Because if they did that you could find it easily and not spent 150 dollars at the dealer on a technician who spends less time "Fixing" your problem than you spend at the register paying for it.

That's why.

I have some very long posts in this same concept regarding among other things the HEVAC systems in automobiles,, Comparing service on a 70's unit with today's units.
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Old 07-20-2010, 05:26 PM   #23
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Now I just need to figure out what's causing it to trip, seems to be related to generator operation.

Oh well, have nothing better to do tomorrow
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Old 07-20-2010, 07:12 PM   #24
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Merrill,
Glad to hear you found the problem. Do you know what this fuse feeds? What was the circumstances at the time the fuse blew.
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Old 07-21-2010, 11:37 AM   #25
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Merrill,
Glad to hear you found the problem. Do you know what this fuse feeds? What was the circumstances at the time the fuse blew.
The breaker feeds 12v from house batteries thru disconnect switch to Magnetek. At the time it tripped had the genny running and roof a/c on. Have noticed so far that if genny is running, it will trip the breaker, but not sure when.
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