power wires

Just installed my new radio and it got me thinking. I was furnished with a heavy duty power cable because of the extra power of having the rfx75. Yet I'm wiring that heavy duty power cable to the same wires in the truck meant for cb radios and those wires are 16 gauge and the power cable is 12 gauge. Would I be better off running my power cables elsewhere rather than using the stock hook up in the truck and if so where? Somewhere directly in the fuse block maybe? Or does it even matter and the stock hookup wires are sufficient?

Another thing I noticed is the ground wire on this heavy duty cable is fused as well as the power. I read something about freightliner trucks being positive grounded and that this is a good idea. If that's the case what problems could arise from not having a cable like this?

 

That's what I'm saying. I'd have to run new supply wires from the fuse block to hook the new power cable to otherwise the new power cable is useless hooking it to the stock 16 gauge that runs in the truck.
Actually being mounted on the dash like mine is the power cable itself will reach the fuse block eliminating the set of wires it's currently hooked to and have one less connection joint making it even better as far as any possible power loss in the connection.
Just wonder what I should run off of in the fuse block especially if my freightliner is a positive ground vehicle like I'm hearing. Correct me if I'm wrong but you wouldn't want to run the ground wire to say a chassis ground then would you? What would you hook the ground to. Like I said the ground wire on this power cable is fused as well as the power wire. I would have to trace the 2 existing wires in that cubby hole up above to see where they run and that's not as easy as it sounds with all the fricken wiring being yellow. How stupid is that? There's a #### ton of yellow wires in that fuse block on the passenger side dash and it's not like they are labeled cb feed etc.
Guess the worst that could happen is blow the in line fuses tho.

I guess my main question here is this: What does the ground wire hook to in a positive grounded vehicle? If I had the answer to this I woudn't need to trace 2 yellow wires in a maze of nothing but yellow wires! Anyone know for sure? I really don't care to experiment to learn the hard way.

I just stumbled across the positive ground thing in freightliners by accident when researching why my new power cable has a fuse in the ground wire. Just another reason tho hate these trucks like I didn't have enough already.
Please boss! Buy me a Pete! lol

I'm going to have to assume that no one here has a clue what I'm talking about so off to research land I go.

 

Perhaps this is what I'm looking for...

https://www.gijoesradioelectronics.com/Images/Cb%20Radio,%2010%20meter%20radio%20and%20amplifier%20hook%20up%20information.htm

Still doesn't answer my question of the freightliner's ground system tho.

Ah I see you're on it too handlebar. Maybe truck country could answer that for me?

Jeff out at truck country is looking into that as we speak and will have an answer for me shortly.

Like you said handlebar I'm going to run 8ga wire direct to the battery. It's just a question of which wire to which terminal now. I should have that answer shortly.

 

could that info you provided on the 25s be the reason I'm having problems receiving/transmitting with the rfx75 installed on that 25 and if so how can I overcome that? I saw all those capacitors you're talking about. on that radio.
At this point I'm more concerned getting my new radio setup right first tho and deal with that 25 later. It powers up and I get squelch noise and the light changes from receive to transmit but no audio or movement of the needle.