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Old 11-27-2012, 01:43 PM   #1
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Hooked battery up backwards

I hooked my battery up backwards and now I have no 12 v to the trailer. I check all of the fuses at the converter and they look fine. All of the fuses at the battery are fine. Does anyone know if there is an in-line fuse between the battery and the converter underneath the trailer in the belly ?pan.band
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Old 11-27-2012, 02:00 PM   #2
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Quote:
Originally Posted by nick11
I hooked my battery up backwards and now I have no 12 v to the trailer. I check all of the fuses at the converter and they look fine. All of the fuses at the battery are fine. Does anyone know if there is an in-line fuse between the battery and the converter underneath the trailer in the belly ?pan.band
It's possible there's an inline fuse.

Year make and model?
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Old 11-27-2012, 02:03 PM   #3
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Old 11-27-2012, 02:43 PM   #4
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Your converter should still put out 12v
Regardless of inline fuse to battery.

There's only a breaker in the fuse panel for converter.

Look in the files section on upper left hand of this page.
Look up your converter there's a detailed trouble shooting guide but most likely you fried your converter.
Don't feel bad it happens more than you think.

Do yourself a favor if it is bad replace your unit with a progressive dynamics if it isn't already. My guess it's a wfco brand currently installed.

Turbs
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Old 11-27-2012, 02:52 PM   #5
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The converter works perfect when plugged into 110v - I just have no 12v
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Old 11-27-2012, 02:55 PM   #6
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About 25 years ago when I was a car stereo installer, I had a guy install one backwards and it reversed the polarity of the battery!!

Of course the battery did not work properly again either but the other batteries were not hurt.

I expected it to melt down the car but nothing happened to the car or the electronics.

Quote:
Originally Posted by nick11 View Post
The converter works perfect when plugged into 110v - I just have no 12v
Try a different battery maybe?
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Old 11-27-2012, 03:05 PM   #7
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Just a thought have you tried to measure the battery wires for about 12-14 volts dc without a battery hooked up?

That should tell you if your converter is hosed.
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Old 11-27-2012, 03:19 PM   #8
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Quote:
Originally Posted by nick11 View Post
The converter works perfect when plugged into 110v - I just have no 12v
There is most likely either an inline fuse or inline resettable breaker.
On MY TT it's fastened to the frame rail just behind the LP tanks underneath
the trailer.
You have a 5er so I don't know where you should look but start at your
battery and follow the large wire back from there.
A fuse or breaker is most likely fairly close to the battery.

Good Luck!
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Old 11-27-2012, 03:30 PM   #9
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Quote:
Originally Posted by nick11 View Post
I hooked my battery up backwards and now I have no 12 v to the trailer. I check all of the fuses at the converter and they look fine. All of the fuses at the battery are fine. Does anyone know if there is an in-line fuse between the battery and the converter underneath the trailer in the belly ?pan.band
Most converters have two auto style fuses to protect against this Look on the end of the unit in a holder attached almost flush with the unit. Both fuses can blow or just the positive.
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Old 11-27-2012, 03:47 PM   #10
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Under the cover of the power center, to the left of the circuit fuses are TWO Orange 40 amp "reverse connection" fuses. Their ONLY job is to blow if you hook up the battery backwards. They disconnect all 12 volt power to the camper to protect your electronics.
Attached Files
File Type: pdf WFCO 8900 Troubleshooting guide.pdf (4.69 MB, 387 views)
File Type: pdf Manual - Power Distribution Center WF-8900 English.pdf (1.89 MB, 271 views)
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