Okay, this is the hardest part of the whole project so far and very necessary.
For an amp to work, it needs power. Power comes from the battery of the car. The battery sits in the engine bay, which is outside of the interior of the car where all the stereo equipment is. Therefore, I need to run a power cable from the battery to the inside of the car where the amp is.
I’ve done some research and got some weird answers, but after really putting my mind to it I have worked out a way! And I’m going to share it with you.
Before I get in to the power, something needs to be said. Your battery has a positive and negative terminal. The power cable itself is connected to the positive terminal, the negative just grounds the electricity. The ground is as important as the power. Otherwise terrible things happen.
Firstly, I have increased the amount of grounding from the battery since I have increased the amount of power I’m taking from it.
So on the right hand side you can see the extra ground I have connected. On the left, you can see the wire I’ve used, the connector and the sleeve. All you need is the wire, and two of these connectors and you can make a ground. However, remember that for the ground to work properly, you need to make sure that the grounding point (under the screw and connector) is bare metal. Scrape it back with wet and dry sandpaper, or a dremel if you have one.
Also, you can go the next step and put another cable like the one I put there from that bolt to another on the body. It really does help and you should always do this stuff properly.
Okay, on to the power.
Okay, this is the engine bay. The engine itself is on the left, the big thing behind the battery is the air box. The air box is connected to the rest of the engine by the big black tube coming out of it. While peeking around, I happened to notice something hiding behind all of that…
A sneaky little grommet leading through the firewall into the cabin! Sure, it’s hard to get to and jam packed with wires, but it’s an in that I can use! However, getting to it is going to be a problem.
I know! I’ll pull the engine apart!
Okay, it’s not that drastic, but looking at it, if we move that air box and pipe out of the way, I reckon I have a good shot at it.
Okay, to remove the top of the box, there are four clips (you can see the two on the right hand side in the photo above). One of the clips is upside down under the hose going to the engine.
WARNING!! The top part of the air box is where the air goes to the engine. That filter on the right stops dirt and dust getting into the engine. If you get dirt or dust on the exposed side of the air filter (that you can see in the photo), it will get sucked into the engine. And that is bad. Just be mindful of that.
To remove the hose is pretty easy. There is a hose clamp that is tightened with a screw. Unscrew the screw like you can see in the photo above and then the hose will pop right off when you pull it.
However, when you undo the screw, take it out of the hose clamp and put it to the side. Otherwise you have to crawl under the car to retrieve it when it falls out. Trust me on this.
With the hose off, as you can see in the above picture, you can now easily get access to the grommet. Okay, not EASILY, but it is now possible. In the photo above you can just see the edge of it. The grommet is held in by a plate that is black, but has two red screws sticking out of it. The red screw in the photo that is right next to the open metal tube where the air hose was, is part of the grommet.
Now, I experimented to see if the grommet would actually lead into the cabin, and it does, but I recommend you do the following anyway because it’s good to get a feel of the path of the cable.
What I did was get a flat head screwdriver and try to prize the grommet out of the housing. I did this fairly successfully, but not easily. It takes a little bit of perseverance, but you can get enough out to stick a screwdriver through it. I got the screwdriver and tried to find the path of least resistance.
It worked! The photo below shows the screw driver in from the engine side, the photo below that shows the tip of the screwdriver sticking out inside the cabin. Even though this is a very blurry photo, it gave me much joy to see it. 🙂
Proof that it can go through. But, that still presents a problem. The power cable is flexible and the screwdriver isn’t. How can I possibly push the power cable through !! Find out in the next exciting post!