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Old 12-12-2012, 06:56 PM   #1
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12v power mystery

2002 National Dolphin 6356



OK, I've been laid up with broken ribs, but decided to go out and spend some quality time with the coach, take it out for a spin around the block to test the brakes after installing OEMY's speed bleeders a few weeks ago and replacing the brake fluid; long overdue.

Was up on the jacks, and plugged into 20A shore power, as I always leave it when I'll be away for an extended period. I started the engine; fired right up eagerly (always satisfying for me). I brought in the slides and retracted the jacks. I turned on the basement lights and the porch light, and walked around to check everything out. I stopped by the power bay and unplugged the shore power.

About the time I close and lock the power bay door and get around to the front of the coach the porch light and basement lights go out. Inside the coach, the 'battery' light is no longer lit. None of the overhead lights in the FRONT of the coach work. The ones in the back work fine. The slides have power, but the jacks do not. The genny will start but shuts off after a couple of seconds (due, I suspect, to lack of 12V power) The salesman switch disconnects all 12V power as it should, and reconnects the 12V stuff that's working as it should.

I suspect this is a fuse, a breaker, or a relay somewhere. Was going to start pulling fuses, but thought I'd drop a message out here to see if anyone had any similar experiences. I did notice a little red light on the far right side of the fuse/breaker/relay panel. Not sure if it is supposed to be on or not.

I plugged it back into shore power, and have no change, still half the 12V is out.
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Old 12-12-2012, 07:51 PM   #2
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Sounds like a breaker or fuse. Check em all. Keep us posted and good luck.
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Old 12-12-2012, 08:30 PM   #3
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The little red light indicates a blowen fuse at that location.
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Old 12-13-2012, 07:08 AM   #4
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Quote:
Originally Posted by Richard S. View Post
The little red light indicates a blowen fuse at that location.
The little red light is one of three situated vertically along the right edge of the fuse board. Just to the left of it is probably 30 fuses. I never noticed it on before, so I'll start there this evening when I get home.

Thanks
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Old 12-13-2012, 07:41 AM   #5
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Since mine is older, it would not be the same board as yours, but still an RV custom products board. Mine has a light for each fuse, which has sure been handy. You may have a light for every 10 fuses?

Althought it doesn't sound like a breaker, you probably have 3 breakers situated on the board. Mine are on the back on both sides and are reset by small buttons. So these 3 lights could reflect a tripped breaker....just thinking outload here.

Anyway, should be more clear once you get in there and take a good look.
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Old 12-13-2012, 08:24 AM   #6
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Since mine is older, it would not be the same board as yours, but still an RV custom products board. Mine has a light for each fuse, which has sure been handy. You may have a light for every 10 fuses?

Althought it doesn't sound like a breaker, you probably have 3 breakers situated on the board. Mine are on the back on both sides and are reset by small buttons. So these 3 lights could reflect a tripped breaker....just thinking outload here.

Anyway, should be more clear once you get in there and take a good look.
Good info, thanks. It is an RV Custom Products board. It's difficult for me to stick my head in there far enough to see the breakers on the back side of the board, due to the aforementioned broken ribs, and I'm loathe to probe around with my fingers in the potentially shocking environment feeling around for popped breaker buttons. I suppose I should use the salesman switch to disconnect everything, and unplug the shore power before I embark on this fuse/breaker fact finding mission.
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Old 12-13-2012, 09:04 AM   #7
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When you say "Fuse/Breakr/Relay I get concerned.. What is the make and model?


On my coach the Fuse box is .. A fuse box No breakers

The breaker box... Likewie. Just a breaker box.

Both of them were made by progressive Industries

And in the fuse box ... if there is a red light... There is a blown fuse.

Or, the relays.. Are elsewhere too.
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Old 12-13-2012, 09:21 AM   #8
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Originally Posted by wa8yxm View Post
When you say "Fuse/Breakr/Relay I get concerned.. What is the make and model?


On my coach the Fuse box is .. A fuse box No breakers

The breaker box... Likewie. Just a breaker box.

Both of them were made by progressive Industries

And in the fuse box ... if there is a red light... There is a blown fuse.

Or, the relays.. Are elsewhere too.
As far as I can tell, all the fuses and breakers are on one board in a bay just aft of the starboard side front tire. The slide control relays are just under it on a separate board. I do not have a separate 12V breaker box as far as I know.
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Old 12-13-2012, 09:39 AM   #9
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Ramblin, never a bad idea to be safe with electricity. However, there is not any 120vac power on that board, it's all 12vdc. But yes, unplug from shore just in case you have any 120vac in the vicinity....unlikey, but possible. Do you see a part and version number on the board? Perhaps I can find a schematic.
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Old 12-13-2012, 09:47 AM   #10
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Ramblin, never a bad idea to be safe with electricity. However, there is not any 120vac power on that board, it's all 12vdc. But yes, unplug from shore just in case you have any 120vac in the vicinity....unlikey, but possible. Do you see a part and version number on the board? Perhaps I can find a schematic.
I tried to see if I could get the part number, but I didn't see one. I could barely make out the 'RV Custom' lettering at the top of the board, due to the large cables attached and in the way. Once I get home from work this evening, I'll snap a picture and attach it here.
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Old 12-13-2012, 10:16 AM   #11
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Once you get a good look, it will probaby be obvious anyway. A pic may help figure it out if you can't. The number on the board would look something like this:

PCB Assembly - 011033-10
REV 5 02/01/2004

Probably hard to find schematic, but with the above info in hand, a call to RV Custom Products in Santa Fe Springs, Ca, 562-921-8353 will do it. They will send you the paper work for the board.
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Old 12-13-2012, 08:11 PM   #12
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UPDATE: 15A fuse bad. Not burned, interestingly. To look at it, it looks brand new. Was the first one I pulled yesterday, looked fine, replaced it. Pulled it again tonight, and put my tester to it. Bad. Replaced it, and all is working again. Makes me want to replace them all.
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Old 12-13-2012, 08:21 PM   #13
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Great update Ramblin, glad it was an easy fix. For future reference, did you figure out the reference between the blown fuse and the red light?
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Old 12-14-2012, 05:38 AM   #14
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Great update Ramblin, glad it was an easy fix. For future reference, did you figure out the reference between the blown fuse and the red light?
Yes, the little red light was right next to a row of fuses. The blown one was in that row. It went out when I replaced the fuse. It was the fuse nearest the light, so I don't know if that light indicated that particular fuse, or a blown fuse in the row. The rest of the fuses don't have individual corresponding lights, but each row of fuses have a light to the right.
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