Forum Discussion

Explorer

Jun 15, 2013

Help Identifying Wires Connected to Battery

Hello Everyone,

I just took ownership of a new Jayco Whitehawk 31DSLB and was a little confused looking at all of the wires connected to the battery. I'd like to clean this wiring up plus I have plans to add a few batteries and possibly inverter/solar.

I could use a little help from the experts on this forum to understand what all these wires are for.

The orange/black wire is for the breakaway cable. The red cable goes to my electric tongue jack. There is a 30A fuse on the red cable. The white wire, obviously, is the negative.

The two green wires attach to the battery positive and both are 30A fused. They are then connected to several other black wires that disappear to the underside of my trailer.

The green wire furthest to the right in the picture "seems" to power everything in my trailer. I left the left green wire disconnected and didn't notice any loss in functionality of anything. Similarly, I connected ONLY the green wire on the left of the picture and nothing at all seemed to work.

I would appreciate any help someone can provide me.

Thanks.

Ryan

14 Replies

HiTech
Explorer
Jun 15, 2013
Those are some very small wires, especially to the + terminal.

Jim
BFL13
Explorer II
Jun 15, 2013
Somebody on here has a Jayco and said the green wires were positive, with one going to the power centre (DC fuse panel and converter) with a 30a fuse, so the other is likely for the slide motor.(Lippert spec has a 30a fuse on our slide motor pos wire) (you already identified the jack one)

The 7-pin pos will merge with a pos wire somewhere on the way to the pos batt post

Hard to clean up wiring, but some use a buss bar approach to collect a bunch of wires and then just have one wire to the battery post.

If you get a Trimetric, you will have the shunt act as a buss bar, where one end goes to the battery neg post and the other end takes a bunch of neg wires.

Solar and an inverter add to the fun!
Canadian_Rainbi
Explorer
Jun 15, 2013
BigFly10 wrote:
Sorry, I think I messed up the picture. Let's try this.

It looks to me like the right side green cable goes to an inline fuse (or is that just a connector?) then connects to the red wire and three more smaller black wires at the blue Marrette.

One of those seems to be in with the black and white wires. Any idea where any of the three go? Can you see where the two individual black wires go? It's possible that one goes to the trailer plug as charging cable. Do you have a power leveling system?
BigFly10
Explorer
Jun 15, 2013
Sorry, I think I messed up the picture. Let's try this.