What are the wires for please?

[SubAvion]

Excluding the very thick Cable connecting to tow vehicle, I see 7 wires into the trailer (close to battery box). One pair is for main 12v power, one small pair for 2 LP tank gauges ( positive only, on the left, overlapping each other). Another Main pair for charging battery from tow vehicle (back feed from the large cable; meanwhile, the positive powers the breakaway switch). What about the 1 small wire please ( the white one on the right in the picture)? Thanks!

[Razorback]

Let’s see..... should have 2wires for LP tank sensors.... positive and ground for the batteries...... a charge wire for the batteries?...... something for the breakaway switch..... and power for the jack?

[SubAvion]

thanks paul, I updated my post. The power jack has another wire that doesn’t go into the trailer, so it’s not in the picture. Now I think Only 1 small wire (on the right in the picture) is unknown.

[Razorback]

Did the original LP tank/regulator setup have a method of switching from one tank to the other from the control panel? I’ll have to check the owners manual.

[SubAvion]

Yes, Paul, mine doesn’t work and I’m not sure how the sensors should be, but from the panel, it differentiate tank 1 and 2. There’s also a switch near the propane regulator to let us select propane from either tank.