Should my jack work on battery?

[EV4D]

Should the Jack on my hitch work off the battery? Or does it only work when plugged into the TV or shore power?

Thanks,

David

[Rustysocket]

It should work when on battery, it's a 12V jack.

[sennister]

Check your 30A fuse.

We blew ours the other day and I noticed it was shot because the jack worked while hooked up to the TV but once I disconnected everything and went to level front to back the jack stopped working.

The fuse is in the little fuse holder outside the camper near the battery.

I have a supply of those 30A automotive blade style (not the minis) fuses because of this.

[EV4D]

Very helpful. I assumed because it worked on shore power and TV power that the fuse was fine - as I believe that the Jack runs off the battery regardless of where the power is coming from.

Ill check!

[bansai]

Once you get the fusing squared away, I *highly* recommend that when you have the option, you only user your power jacks when hooked up to a running tow vehicle, or shore power.

Those jacks gobble up more power than my daughters (and my own) youtube habits combined. I could probably run my LED lights in the camper for a full day with the power that jack uses just to setup / tear down camp. Same with the slide out(s).

[sennister]

Originally Posted by EV4D

Very helpful. I assumed because it worked on shore power and TV power that the fuse was fine - as I believe that the Jack runs off the battery regardless of where the power is coming from.

Ill check!

I thought the same thing. Unless I blew it when I unplugged the power from the TV. Most people comment that they blow the fuse while hitting the limits on the jack. As I mentioned I was unhooking and I lift the truck up to ease the removal of the WD hitch bars. I then normally lower it back down to release the ball then back up to clear it. That is when I disconnected everything and noticed that it didn't work as I couldn't bring it back down to level. Going up to clear the ball isn't near the top limit and while it is my driveway, this is on pretty much level ground. I popped in a new fuse and it was working fine off battery.

I agree that this is a pretty big draw on the battery. More so if you are running a single 12V like I am. Once leveled out it gets plugged in anyhow so that recharges it anyhow.

[jasum]

Originally Posted by Rustysocket

It should work when on battery, it's a 12V jack.

Rusty socket is correct.

[kendo68]

The cheap Chinese jacks jayco uses blew the fuses when over extended
I upped mine to 35 amp fuses after going 6 in one day and lower the line .

Sent from my SAMSUNG-SM-G930A using Tapatalk

[EV4D]

So it turned out that the Positive cable had fallen out of its battery cable lug, which was still attached to the terminal. I recrimped it and everything seems to be fine now.

I really don't like the lug that they are using, seems like the cable could come out again. Does anyone ever change these things out? What do you use?

[Iraqvet05]

Mine are crimp on too. I thought about using a quick disconnect for some of the smaller 12V terminals that attach to the battery like this https://www.amazon.com/Allstar-Perfo.../dp/B003C01FD6

Also thought about just soldering on the ring connector which is a more secure connection than crimping.