Big 3 Powerline upgrade to fix power steering
TL;DR: Chevy Sonic and Cruize have a notorious grounding issue that, b/c is fully electric power steering, the computer can decide it's an optional accessory when powering on...along with other random ghosts in the machine.
Actual Question: If I run a second positive cable from the alternator to the battery for a big three, but it's the alternator and not an amp I'm trying to protect, the fuse still goes close to the battery right? Because that's where all the potential in the circuit is located should a short occur, or something like that...
So anyways, my 2015 Chevy Sonic 1.8L started having an intermittent issue where sometimes I had power steering when starting my car, sometimes I did not. Since the power steering motor is built into the steering column and not a separate part, I decided to rule out the ground issue.
After tracking down each stupid ground point on the car and finding every single one of them shiny and corrosion-free, I decided to take my old man's approach to a bad starter when I was a kid - by adding a bigger ground (strap) wire to a new location.
That's when I learned about "The Big Three". So, armed with some 675 strand 4awg, I upgraded the engine ground to chassis. Boom, problem gone (AFAICT, for now) proving the old car audio joke true that with a big enough amp you can solve any car problem. Or in my case, a car amp's pre-wiring, lol.
I'm still going to finish the other two cable runs (pos & neg from alt to battery) but I have the aforementioned question and...honestly, this last cable management question?
What do I use to secure these wires alongside (not through) the firewall or other parts of the engine well for routing?