Terminate the ends of the cable with ring terminals, then connect the wire from battery positive (+) terminal to your alternator.
Once you have made the new, beefier battery ground, you can cut off, disconnect, do whatever you want to the stock ground wire because it is not needed anymore. To prevent rust, use a rust inhibitor product around the contact points.
Lastly, the final step is to run a wire from your battery’s ground (-) terminal to the ground location on the chassis. Look for a non-essential bolt; do not use a bolt that holds fluids back.
Before you do anything, make sure to be safe. This makes an incomplete circuit and keeps you safe from sustaining electrical injuries.If you’ve ever measured your voltage drop when playing music with the volume to the max with your engine running, you’ll see that instead of reading 14. Disconnect the wire from the negative terminal of your battery before you begin. Large amplifiers can pull up and over 200-300amps, so now you see the problem. Quite a large difference for how much you spent on the wire and terminals. The wire I used was Knu Konceptz 1/0 Kollosus Kable You will also need 1/0 ring terminals to terminate the ends of the wire. Before I did this upgrade, my voltage was at about 10v under heavy load. That’s why the “Big 3″ is considered the first electrical upgrade you should do to ensure consistent power to your amplifiers. There is a small chance that the wire will come lose and short out, but it’s a chance some people do not want to take. This is to strengthen the ground. I had a Treo SSX 1500. Then terminate the ends with ring terminals and attach one end to the negative terminal and the other to your Coaxial Cable Manufacturers grounding location on your chassis (as seen above).
The next step is to run a wire from your engine block to your car’s chassis.8 (depending on car), your voltmeter will read 13v, 12v, or even lower! You can easily tell if you’re experiencing these voltage drops by watching your headlights. Battery positive (+) to alternator – From the positive terminal on your battery to the alternator positive (+) post
When doing this mod, 3 runs of wire will need to be installed. The rust is because of time; I did this big 3 installation about 2 years ago. There may be a plastic tab on the alternator post. Measure the wire and be sure to leave a little slack in case you need it.
What causes this problem are the stock, small gauge wires used to connect various electrical components. Engine block to chassis ground – From engine block to chasis.
The location is a little rusty, but you can see how I sanded off the paint until it became bare metal. This voltage drop could potentially cause harm to your amp if it is significant enough. If you don’t remove the plastic tab, you won’t be able to remove the nut off of the terminal post.1 blow because I was letting my voltage drop to about 9-10v, which the amp didn’t like very much.
First, measure a length of wire to go from your battery positive (+) terminal to your alternator. A good start is to follow your stock ground wire back to its grounding location. If there is paint on the ground location you have chosen, you must sand it off until it is bare metal to ensure minimal electrical resistance.
From there, you then need to attach the other end of the wire to your chassis ground location. On the contrary, I have had no problems in the 2 years I’ve had the big 3 installed while running an unfused wire.
3. When you think you’re finished, go ahead and double check all of your connections making sure that they are snug and tight.
I recommend using 1/0 gauge wire. The stock wire is usually 8 gauge, which is sufficient enough for roughly 50 amps. You should notice a difference in voltage when playing your system at max volume.
That’s it! The “Big 3″ is now finished. After doing the “Big 3″ upgrade, my voltage under heavy load was stabilized at about 11v. They are:
1. Make sure to leave a little bit of slack, around 6 inches, so you’ll be able to position the cable freely. This step may be difficult because you may have a hard time finding a place on the engine block to attach your wire. If they dim while playing your system, you most definitely have voltage drop going on. This ground can be anywhere on your car’s chassis/frame, but make sure that you have metal-to-metal contact with the terminal and your ground location.4v or 13.
Adding a China Computer Wire Suppliers fuse to go in between the battery positive (+) and the alternator is highly recommended, but not necessary.
. If there is, go ahead and break it off; it’s what I had to do. Battery ground (-) to chassis ground – From the negative terminal on your battery to your car’s chassis. You could use 4 gauge wire if that’s all you have laying around, but you might as well use 1/0 the first time so you won’t have to go back if you decide to upgrade your system later on down the road.