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Old 06-21-2017, 11:09 PM   #1
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Electrical / battery question

I have been having trouble with keeping the battery charged. I store my 3200 plugged in to shore power and normally leave the battery disconnect on. This has worked fine for several years. It seems the battery is not being charged now. What should I check for. With a dead battery I have found these units are dead in the water. Nothing works without a good battery. Seems silly that they are wired this way
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Old 06-22-2017, 02:46 AM   #2
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Check the obvious, i.e. connections at the battery. Then, somewhere on the tongue, follow the battery positive wire on its way towards the interior. Often you will find it goes to a small component, that looks like a relay, but with only two terminals. It is a self-resetting circuit breaker. Because it is outside, they often corrode. You should be making voltage checks along the way. If your interior lights work on shore power, (meaning the converter is producing 12 VDC), then your problem is between the converter and battery. Check fuses at converter, too.
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Old 06-22-2017, 04:20 AM   #3
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Are you checking the water in the battery?
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Old 06-22-2017, 08:48 AM   #4
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I found the converter and discovered all three of the fuses were blown. I am pretty sure that is my problem since I just got a new battery. I will have to get some 35 amp fuses.
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Old 06-22-2017, 02:38 PM   #5
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I found the converter and discovered all three of the fuses were blown. I am pretty sure that is my problem since I just got a new battery. I will have to get some 35 amp fuses.
Blowing those big fuses usually means a battery was installed with reversed polarity. Double-check yours before you replace them. Black is not always negative, depending on model.
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Old 06-24-2017, 05:20 PM   #6
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Blowing those big fuses usually means a battery was installed with reversed polarity. Double-check yours before you replace them. Black is not always negative, depending on model.
NO!! Black is always "+" white is "-" even the power connections on your truck 7 way plug, white is always "-"

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Old 06-24-2017, 05:36 PM   #7
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NO!! Black is always "+" white is "-" even the power connections on your truck 7 way plug, white is always "-"

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On my TT, it is that way also. You have to think of it like house wiring. Black is "hot," white is "neutral." However, many people, thinking of automobile electrics, think "red is positive, black is negative." The OP hasn't gotten back to us, but I'll bet he installed his new battery backwards.
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Old 06-27-2017, 12:17 AM   #8
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Likely a bad batt, possibly from over charging, and possibly a bad cell or two.
From my experience, if a cell goes bad, your converter will just run and run and run, as it will not detect a fully charged battery for the converter charger to stop charging. This causes the batt to get real hot, boil (cooking the battery), and leaking, ruining your batt more. Checking your batt fluid and health monthly is a best practice on wet cell batts. Only use distilled watter when topping them off.

If you have not messed with your wiring, or created some situation where you are grounding out to cause fuses to pop (coroded wires can cause this), I would check/replace the batt. Maybe go with two 6v's if you only have one 12V now; my preference is 4 6V batts as I dry camp alot, others may like 12V as their preference.
Batt maintenance is easy after you do it a couple times, and takes less than a couple minutes. Also, be careful with batteries, as the gasses are flammable, and can explode in certain rare instances, which I have witnessed. This is why the batt box in your rig should be used as well as the vent hose, and no spoking during batt maintenance. A given, but should be emphasized.

Good Luck, I hope you sort it out.
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Old 06-27-2017, 12:26 AM   #9
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Something else worth mentioning, is to kill power either at the panel or in the RV when plugging-in your cord. This allows you to seat the cable into the RV properly before applying power to the rig, which can sometimes fry/break things if power is applied to the RV prior to the cord ground being fully engaged/connected when the pos teminals are connected.
Also a "given" is to make sure A/C is switched off when plugging in. Pretty standard knowledge, but mention-able anyway, as my Mother experienced a failure when plugging in her powered 5ver 30A cord last year and fried her ac board.

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