petrojr
Massachusetts
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I just replaced my 12v batteries with 2 6v's this weekend. In reading other posts it is stated that the neg wire is grounded to chassis near battery box. My wires are red and black. At the converter I have a red wire on the POS and a Black wire on the NEG. At the Chassis I have the red wire grounded, connected to a little box on the A frame, and a wire coming off of the box to connect to the battery. The black wire comes out of the floor. I hooked them up this weekend, RED to POS and Black to NEG and just used the radio and lights and all seemed to work fine. However when I plugged in my inverter to a 12v dc socket it beeped and the failed light came on. Does this mean that the Red wire is actually NEG and the Black is positive?? How can I be sure without hurting my electronics?
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firemedic08
North Central PA
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Only way to know for sure that I know of is to actually trace the wires.
Donnie
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Keith M
Cle Elum
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Are your two 6 volt batteries wire in series with a negative terminal wired to a positive? It sounds like your have it wired correctly. With a single wire between the two batteries that would leave a negative and a positive terminal to hook up to the 12 volt fuse box. The red wire coming off the battery is not grounded. It might look like it is but it should be connected to an insulated junction with a red wire coming from the circuit breaker. That is how your batteries get charged The black wire off the battery should go to a ground somewhere where there will be some other wires connected to the 12 volt fuse box in the RV. In the case of my Rv a number of white wires are grounded with the house battery. A voltage meter with the positive lead on positive battery and the other touching anywhere on the frame would tell you its wired correctly.
* This post was
edited 05/23/11 01:46pm by Keith M *
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2oldman
Winchester WA
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IF the fans are running backwards, it's wired wrong.
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skipnchar
Topeka or somewhere else
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You've got my head spinning. At the converter the red is positive but you say you GROUNDED the red wire at the battery. doesn't sound correct to me. Standard 12 volt is Red positive and black negative, however MOST RVs are WHITE negative and any other color positive. How were your original batteries wired. That would be the easiest way to tell what is correct and you wire the 6 volts the same way (as far as connecting them to the RV). Negative would be GROUNDED and positive connected to the wire heading for the converter.
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petrojr
Massachusetts
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Yes, they are wired in series, and the leads/trailer connections are connected to the pos on one battery and the neg on the other
Maybe I am looking at the insulated junction you talk about as there is a red wire coming from the trailer to this little box attached to the A frame and then off another screw is the red wire lead to the batteries that I am assuming is the positive.
Why would the inverter beep and the fail light come on?
Is there a way to test with a meter?
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petrojr
Massachusetts
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Found the ground to the chasis Thanks everyone for your assistance
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Keith M
Cle Elum
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The beeping is almost alway from low voltage from 12.3 volts and down. On the cheaper 400 watt inverters I have always removed the beeper button. These thing will almost alway beep and wont start if you are trying to start anything over about 200 watts. Always use an ineverter of at least 800 watts and 1600 watts peak power. I know it might not make sense but thats what you have to do.
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