House battery wiring help

[JVR]

2005 Essex 4508 all electric
In the tray that holds 6- 6v batteries, I'm not sure of two of the cable connections. Other than the large 3/0 cables there are three other smaller wires.

1. One is fused with a 30amp fuse and in connected to the positive side of the rh rear battery, not shown. I think this wire supplies 6v to the coach lighting.
2. The second is equipped with a lug shown in the center of the picture.
3. The third is the terminal not connected in the picture.

I would appreciate knowing where each of the 3 should be attached.
Thanks,
JVR
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[GaryKD]

Hi JVR,

My assumption is the items in your OP require + 12 VDC. The wires are not for ground.

I do not know your coach, but a general rule to follow is everything requires 12 VDC. With a meter, ensure anything going to the coach is connected to a battery terminal that shows 12 VDC.

If the pink wire was factory installed you can bet there is no "extra" wire. Find a terminal that the wire will reach. Sometimes these are "daughter" connections right off the parent connection.

["007"]

Pull the black wire wrap back or wire out of split wrap you may see some print on wire to indicate where it goes.
A colored wire most likely goes on battery + battery post.
The pink may change to white if pulled back far enough may be discolored from red battery lug paint.

[JVR]

Thanks for the tips, but I was optimistically thinking someone with a similar coach would look at his connections and report which post each of the 3 small wires are connected.
Thank you for your assistance.

JVR

[JVR]

Resolved by Jeff at Newmar

• The pink wire is actually white and stained by battery post spray, as suggested by 007, the wire's function is simply a ground for the dash radio.
• The wire on the rear center battery's neg terminal which appears to be a phone cord adapted to a battery lug is a temperature sensor, it is correct. Jeff stated most temp sensors do not have a terminal lug and are stuck on a battery with adhesive.
• The third wire with the 30A fuse, is as stated 6V power for interior lighting.

I hope posting this resolution saves someone a little trouble in the future.

["007"]

Added your post to my favorites for future reference.
My list is getting loooooong.
Thanks for the info JVR.