Scamp 5er electrical problem - Page 2 - Fiberglass RV


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Old 12-12-2012, 08:13 PM   #15
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Originally Posted by CeliaL View Post
There is a fuse immediately off the battery, one just inside the trailer under the stairs, and one on the converter. The rest are all before the lights, stove fan, etc. All the fuses are good. Every thing works now that the battery is recharged - except the pump. I think I ran it dry trying to get all the water out of the tank (the tank drain doesn't work) I have a friend who is an electrical engineer coming to look at it next week, I guess I'll just order the converter so she can install it if needed. Is there any hope for the pump?
It seems obvious to me that the converter has failed- it's not doing the "automatic changeover" to 12v operation of the interior appliances/fixtures.

It also seems obvious that your immediate problem is powering the pump so that you can get antifreeze into the system before it freezes and all H-E-double-pitchforks breaks out in the tubing that makes up the plumbing in the rig.

I think the best we can do for you at this moment in time is to suggest ways to power the pump long enough to freeze-protect the water system. My ever-so-ignorant suggestion would be to just cut the pump wire and hook it directly to a running vehicle's battery while you add the antifreeze through the tubing.

I'm sure there are better ways, perhaps involving ordinary household "adapters"... maybe someone more educated about these things than I am will make a suggestion.

Good luck!

Francesca
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Old 12-12-2012, 08:32 PM   #16
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I poured antifreeze down all the drains and have sealed up all the windows, skylights, vents, and the AC with bubble wrap, plus leaving the drawers and cabinets open. My little electric heater is keeping it at about 50-60F inside so I think I'm OK until I can get a new converter and pump installed.
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Old 12-12-2012, 08:40 PM   #17
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Originally Posted by CeliaL View Post
I poured antifreeze down all the drains and have sealed up all the windows, skylights, vents, and the AC with bubble wrap, plus leaving the drawers and cabinets open. My little electric heater is keeping it at about 50-60F inside so I think I'm OK until I can get a new converter and pump installed.
Do make sure to either place a dehumidifier inside or allow for some ventilation/air circulation...failure to do so can result in very serious mold problems!

Per replacement of the pump:
If I were in your position I wouldn't do so until I was assured that it had a problem other than a simple lack of 12v power. That seems to me to be the most likely cause of its present "failure" to operate.

Francesca
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Old 12-12-2012, 09:45 PM   #18
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Originally Posted by CeliaL View Post
There is a fuse immediately off the battery, one just inside the trailer under the stairs, and one on the converter. The rest are all before the lights, stove fan, etc. All the fuses are good. Every thing works now that the battery is recharged - except the pump. I think I ran it dry trying to get all the water out of the tank (the tank drain doesn't work) I have a friend who is an electrical engineer coming to look at it next week, I guess I'll just order the converter so she can install it if needed. Is there any hope for the pump?
I wouldn't be too quick to jump to the conclusion that the converter is defective. You said earlier that the battery was completely dead when you got the trailer. From all you've said, it appears to me you've got a battery with a shorted cell. This happens if a battery is run completely down and left in the state for a period of time, and can happen even if the battery is just run completely down. It's not hard to remove the battery, and take it to a automobile repair shop and have it tested.
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Old 12-12-2012, 09:51 PM   #19
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While you're on the line, Byron:

I think you must have looked at the Scamp wiring diagram:

If the converter is working properly, shouldn't it be putting 12v power directly to the various fixtures, and working independently of the battery?

Francesca
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Old 12-12-2012, 10:20 PM   #20
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At least on my scamp the converter will power all 12 volt circuits without a battery hooked up
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Old 12-13-2012, 01:20 AM   #21
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Quote:
Originally Posted by Francesca Knowles View Post
While you're on the line, Byron:

I think you must have looked at the Scamp wiring diagram:

If the converter is working properly, shouldn't it be putting 12v power directly to the various fixtures, and working independently of the battery?

Francesca
If the battery has a shorted cell, the converter/charger will attempt to charge it with a full 20+ amp (American Converter, which is what Scamp was using for quite awhile). If the battery wants more, which it would with a shorted cell, the converter/charger will fold back to lower voltage to the point of putting out a maximum of 20 amps. Any other 12 volt item you turned on would attempt to increase the current output and cause a lower voltage output and converter would still be supplying only 20 amps.

Hope that makes sense to you.

One real problem with people that put in 45 amp converter/chargers, the wiring isn't big enough to handle 45 amps. With a 45 amp converter/charger, current 20 amp wiring, and a battery with a shorted cell you could have a bit of a fire.
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Old 12-13-2012, 01:27 AM   #22
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At least on my scamp the converter will power all 12 volt circuits without a battery hooked up
See my response to Francesca.

Celial could pull the battery and see it things come and work properly then. That would confirm that she has a bad battery.
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Old 12-13-2012, 08:03 AM   #23
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Now if she has one of those cheap, plug in $2.50 voltage readers, we'd have more to go on.





Sorry, couldn't resist.
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Old 12-13-2012, 10:22 AM   #24
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Quote:
Originally Posted by Hambone View Post
At least on my Scamp the converter will power all 12 volt circuits without a battery hooked up

Quote:
Originally Posted by Byron Kinnaman View Post

Celia could pull the battery and see it things come and work properly then. That would confirm that she has a bad battery.
Hear that, Celia? An easy way to isolate the problem, or at least narrow it down!

Francesca
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Old 12-13-2012, 02:37 PM   #25
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So I think I've found all the fuses, wiring, etc., although what I have is not what Scamp uses now... I unhooked the battery and had NO power inside to the 12V - so it is the converter. Ordered a new one and all the stuff that goes with it, install next week I hope. Thanks for the help
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Old 12-13-2012, 03:04 PM   #26
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Good goin', Celia!

And here's hoping that the old converter didn't fry the battery so you won't have to buy a new one of those, too...

Keep us posted!

Francesca
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Old 12-19-2012, 06:26 PM   #27
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Update! My electrical engineer friend was over; we traced back all the wiring, fuses, checked with and without the battery - and the problem was a shorted PUMP! Apparently the switch to the water pump was left on (oops) and the short took out the battery and all the other 12V stuff. Never blew the fuse though. The battery, converter, switch breaker box, and all the fuses are fine. Tomorrow I'll find out if Scamp will take all the unneeded parts back... We labeled everything and I got a crash course in trouble shooting, so hopefully the next time I can narrow down the problem faster. Still not sure I can fix it though Thank you all again!
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