Where does the charge wire from the TV go?

jkjenn

I might be overthinking this, but I am really stumped. How does the 7 pin cable on the trailer charge the battery? Does it connect to the trailer wiring somehow that is connected to the battery? It doesn't seem likely that is so, as the trailer wiring from the battery supplies power to the trailer from the battery. My TV is wired for a charge wire, but it seems there should be a charge wire going to the battery from that cable somewhere. Am I over-thinking this?

Nomad

I always thought the charge wire went through to the converter and the converter then controlled the battery charging. Will be interested in what the real answer is.

jkjenn

PXLated said:

I always thought the charge wire went through to the converter and the converter then controlled the battery charging. Will be interested in what the real answer is.

That is what I thought, too and maybe that is how it works. I was testing my voltage today and started getting paranoid, lol.

Sgtjohn

I thought the center of the 7-way plug was for the "hot wire" to charge the battery??

JandJ92010

The battery in your TV is connected to the T@B battery through the 7 pin. Found out the hard way. While removing the battery out of the T@b, accidently touched the battery wire to a ground, Blew the fuse that is under the hood of my van.  On the diagram that I have the center pin on the 7 pin is for back up lights, the battery charge connector is at the 1 o'clock position.

jkjenn

My question isn't about the 7 pin connector on the TV, it is where the 7 pin connector goes to charge the trailer. It doesn't go straight to the battery, it goes to a little junction box under the trailer. After that, where?

wizard1880

The junction box is where everything is tied together. Basically, the charge pin on the 7-pin trailer connector (t@b side) is connected to the t@b's battery and feeds the t@b's 12v electrical system. The converter box is only used when plugged into 120v.

jkjenn

wizard1880 said:

The junction box is where everything is tied together. Basically, the charge pin on the 7-pin trailer connector (t@b side) is connected to the t@b's battery and feeds the t@b's 12v electrical system. The converter box is only used when plugged into 120v.

Thanks, @wizard1880

So, should there be a charge wire from the junction box to the battery in addition to the trailer wires that provide power from the battery to the T@b? Or is there really one set of wires that both charge the T@b and provide power to the T@b?

wizard1880

Yep, the wires are all twisted together in the junction box, so wires from the battery, the main t@b power distributor (part of the converter), and the 7-pin connector are all spliced together there.

The voltage regulator in your TV's alternator determines how much charge the t@b's battery gets. Normally there's a lot of power loss in the wiring, so the t@b's battery doesn't see the 14.4v your TVs battery does. But it gets anywhere from 13.5 to 14+ depending on the wiring gauge.