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Old 06-22-2018, 07:20 AM   #1
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Battery fail

Yesterday when hooking up my battery I put the negative wire on the positive terminal and vice versa. I caught it within 20 seconds or so but I now have a blown fuse to my fans which I assume is because of what I did. Did I also hurt the battery? It wonít read over 2/3 charge on my camper battery level indicator.
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Old 06-22-2018, 07:23 AM   #2
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You took out the converter fuses that protects it. Should be 30 amp. Check them.
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Old 06-22-2018, 07:26 AM   #3
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You took out the converter fuses that protects it. Should be 30 amp. Check them.


The only thing I see blown is a 15amp fuse for the roof fans. None of my breakers are tripped and my 40amp fuses are fine.
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Old 06-22-2018, 07:27 AM   #4
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You don't have a signature line nor did you list the make/model of your unit in your post (all helpful information when asking for help) so at this point all we can do is make suggestions.

Have you checked the reverse polarity protection fuses in your converter?
They are there to protect from exactly what you have done.
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Old 06-22-2018, 07:29 AM   #5
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Originally Posted by mpotapa View Post
The only thing I see blown is a 15amp fuse for the roof fans. None of my breakers are tripped and my 40amp fuses are fine.
Have you tried replacing the fan fuse?
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Old 06-22-2018, 07:29 AM   #6
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When you say "2/3" are you talking about one of these:



If so, 2/3 is actually 'Good' Note the other scale for 'Battery' is C, G, F, L:

C = Charging
G = Good
F = Fair
L = Low

These things work off voltage, so 'Charging' means it's over 13.something volts (don't remember the exact cutoff). Good is high 12's, Fair is mid-range 12's and low is under 12.

Hopefully somebody will come along and provide the correct cut off voltages.... Please... I'd really like to update my notes.
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Old 06-22-2018, 07:35 AM   #7
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Kaadk is correct that many get confused with that type of monitor/indicator.
If you have that type, it will only read C (charging) when plugged into shore power.
Otherwise it will read G (good) If it doesn't read C when plugged into shore power, I'll suggest again to check the reverse polarity fuses.

Do not just look at the fuses. Test them with a multimeter. If you do not have one, get one and learn how to use it. If the fuses are good, the meter will come in handy as we continue to show you what to check for next.

Here is a photo of a newer control panel.
Still the same concept, the E-1/3-2/3-F is for the tanks.
the L-F-G-C is for the battery.
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Old 06-22-2018, 07:42 AM   #8
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Originally Posted by 5picker View Post
You don't have a signature line nor did you list the make/model of your unit in your post (all helpful information when asking for help) so at this point all we can do is make suggestions.

Have you checked the reverse polarity protection fuses in your converter?
They are there to protect from exactly what you have done.


Thanks, both 40 amps are blown. Do you think the 15amp being blown is because of the incorrect hook up?
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Old 06-22-2018, 07:44 AM   #9
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Quote:
Originally Posted by Kaadk View Post
When you say "2/3" are you talking about one of these:



If so, 2/3 is actually 'Good' Note the other scale for 'Battery' is C, G, F, L:

C = Charging
G = Good
F = Fair
L = Low

These things work off voltage, so 'Charging' means it's over 13.something volts (don't remember the exact cutoff). Good is high 12's, Fair is mid-range 12's and low is under 12.

Hopefully somebody will come along and provide the correct cut off voltages.... Please... I'd really like to update my notes.


Thanks! I didnít know this. My battery level is now fair. Since both my 40amp fusses are blown does this mean itís not being charged through the camper?
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Old 06-22-2018, 07:53 AM   #10
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Originally Posted by mpotapa View Post
Thanks! I didnít know this. My battery level is now fair. Since both my 40amp fusses are blown does this mean itís not being charged through the camper?
Yes, the blown fuses will not let the converter charge the battery or supply 12v to the trailer. The only 12v you are getting is from the battery itself and as you mentioned it is now at 'fair' so it is getting discharged from use.
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