Can anyone help?Looking in the battery compartment I have 1 red positive wire and 2 negative labeled wires , one of the negative wires is black it maybe a 6 or 8 gauge can’t tell which is running to the converter. But there is a smaller white wire which is 10 gauge which is written on the wire. Can anyone tell me what this smaller wire is for and where does it go?Thanks

You are kinda on your own here...The RV WORLD wiring is usually BLACK for hot and WHITE for Ground... The RV World follows the house wiring codes...The AUTOMOTIVE WORLD RED is for HOT and BLACK is for Ground..The Problem is the RV World incorporates a BATTERY so you will find all kinds of mixing wire colors as things are used for both Automotive and RV's worlds...Then if you pick up a New To You trailer you will have no idea what the previous owner has added...You just have to trace out the wiring and see where they go in most cases...Usually not hard to trace the battery wiring out... I always note on the battery case where the NEG TERMINAL is located and then wire accordingly...I like to use the HEAT SHRINK TUBING at the terminal ends and either write on the labels or use a color I know what is what... I also want all of my terminal connections using the ring terminals.Roy Ken

The white 10 wag wire, and black 8 ga thicker wire marked negative go to battery negative. Red wire 8 ga goes to battery positive.

Never hurts to grab your multimeter and check the wires for continuity back to the dc diistribution panel. That will tell you for sure. Battery disconnected of course.

Maybe it goes to the camper plug that connects to your truck? Disconnect it from the battery and see if it's common to the truck's ground or common to the camper's ground.

Bigfoot (2 negative battery ground wires???) | Good Sam Community

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RoyB
Explorer II
Mar 19, 2019
You are kinda on your own here...

The RV WORLD wiring is usually BLACK for hot and WHITE for Ground... The RV World follows the house wiring codes...

The AUTOMOTIVE WORLD RED is for HOT and BLACK is for Ground..

The Problem is the RV World incorporates a BATTERY so you will find all kinds of mixing wire colors as things are used for both Automotive and RV's worlds...

Then if you pick up a New To You trailer you will have no idea what the previous owner has added...

You just have to trace out the wiring and see where they go in most cases...

Usually not hard to trace the battery wiring out... I always note on the battery case where the NEG TERMINAL is located and then wire accordingly...

I like to use the HEAT SHRINK TUBING at the terminal ends and either write on the labels or use a color I know what is what... I also want all of my terminal connections using the ring terminals.

Roy Ken

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Bigfoot (2 negative battery ground wires???)

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