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Open Roads Forum  >  Class A Motorhomes  >  Maintenance Issues & Tips

 > 2006 Sunova 12V ground problem.

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enblethen

Moses Lake, WA

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Posted: 10/07/21 06:55pm Link  |  Quote  |  Print  |  Notify Moderator

Did you check for 12 volt DC output?
Check for 120 volt input to converter?
Did you check the reverse polarity fuses on the converter, if equipped.
Make and model of converter?


Bud
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Rolin

Oregon

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Posted: 10/08/21 10:41am Link  |  Quote  |  Print  |  Notify Moderator

Hi Enblethen,
- Checked the 12v output...shorted by accident and tripped a breaker. I was in a panic for a few minutes until I found the breaker that was tripped. Working on a friends MH, my goal is do no harm.
- Verified 120v input to the converter
- Converter has two 30A fuses and verified they are both good with an ohm meter.

The Converter is a Magnetek 7400 series. At least it matches the description given on Best Converters website where they list obsolete converters. The converter has one green wire that is grounded to the frame, and two black wires. One goes to the breaker panel, the other I assume toward the front of the MH where I found the tripped breaker.

I would recommend they get a new converter but want to be sure we know what the problem is before moving on to improvements.

Thanks for the inputs,
Rolin

enblethen

Moses Lake, WA

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Posted: 10/08/21 08:19pm Link  |  Quote  |  Print  |  Notify Moderator

Is there 12 volts dc on both sides of each of the reverse polarity fuses?
There should be in most 12 volts panels a fuse going to the converter and/or one for Bat.
Tripped circuit breaker was a 12 volt DC one? That could indicate the converter or batteries are reversed polarity.

* This post was edited 10/08/21 08:28pm by enblethen *

Rolin

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Posted: 10/14/21 10:44pm Link  |  Quote  |  Print  |  Notify Moderator

Problems resolved:
Engine not starting was because of poor connection in battery compartment. Working great now

Dead House Batteries was due to a poor connection from the converter to ground on the frame. Took awhile to locate where the wire attached to the frame. The nut securing the ground wire was loose. Cleaned the area and tightened the nut. Now the converter is charging the new house batteries like it should.

Thanks everyone for your help.

enblethen

Moses Lake, WA

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Joined: 01/05/2005

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Posted: 10/15/21 06:21am Link  |  Quote  |  Print  |  Notify Moderator

Thanks for the update!
Safe travels.

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 > 2006 Sunova 12V ground problem.
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