Tryin to wire up an AUX power deep cycle 12V battery on our camper trailer and I don't know if I should hook up the black 10 or 12G Black wire with the 14G black wire for the Hot and vise versa with the white which is the ground as stated by the manual for the ground. Previous owner must have cut the harness that was originally equiped for the battery power.

 

If I understand what you're asking, all you need is a multimeter and 2 minutes to figure it out for sure. Just put it on the continuity setting (the one that makes it beep when you touch the leads) and then put one lead to the prong on the trailer harness adapter that plugs into your truck, since you know for sure that the white and black leads there are the power and ground. Then touch your other lead to each of the two matching colored wires on the end you're not sure about. When it beeps it means that the wire is connected, it should beep for both of the white grounds I'd assume and maybe even both of the black positives. If it beeps for both, I'd probably just use the thicker wire one of each. That make sense to you?

 

Alright I'll go try that

 

So small white as the black and the large white as the red made noise but no combination with any wires made the blacks beep

 

You need to put one of the probes from the multimeter on the connector that connects to the trucks trailer harness. In your case it probably looks like this

 

I did that and nothing made the large black or small black beep at all

 

Weird, idk what to say other than to just try and physically look at where the wires go to

 

Guy on another forum has a Coleman and told me both blacks to positive and both whites to negative so hopefully that works out lol