Connecting an car parametric graphics equalizer into your car audio system is ideal because it acts as an crossover and gives you full control different sound frequencies you want to make louder and quieter. A car equalizer comes in 5, 8 or 12 bands and usually has adjustable sliders or buttons on the front of it, each one controls how loud you want different frequencies to sound, which are the bass, which is the subwoofer, the mids, which are your door speakers or your 6x9 speakers and the highs, which are the tweeters. Tweaking a car equalizers settings can give you more potential to gain more sound quality in your car audio system, as you can fine tune different bands, to adjust how you want your music to sound. The installation of connecting it to your car head unit is simple if you have the manufactures diagram, which is inside the user manual, however if you have misplaced it, then use this guide with step by step instructions to help you hook it up to the deck.
1) First you will need to mount the car equalizer into an location in your vehicle, such as underneath the drivers dashboard area and then run the wires through the car interior and into the car head unit's location, so then you can reach the wires and connect them, then you can begin to hook it up.
2) Next make sure you switch of the car's ignition, before you begin this installation, this is for your own safety, when connecting the wires. Then go ahead and remove the car stereo from the mounting cage, this is by first removing the fascia plastic trim and pull the deck out of the mounting cage, that is holding it in place.
3) Get the graphics equalizer you want to connect to your car stereo, you will notice on the rear of it 3 wires, a yellow wire, a blue wire with a white stripe going down it and a black wire. The yellow wire is the wire that connects to an 12 volt source. The blue wire is knows as the 'power control' or 'remote turn on wire', which connects to the blue remote turn on wire on the wiring harness on the deck. This wire tells the car equalizer to only power on when you power on the radio, so the car eq doesn't constantly drain power from the car battery when your not using. The black wire is the ground.
4) Now look at the wires on the wiring harness, first look for a ground wire, it is a black colour, you can't miss it. Once you have found it, connect the black wire from the car equalizer to the black wire on the deck's wiring harness.
5) Now find the amplifier remote turn on wire on the wiring harness, it is an blue colour wire. Connect the blue wire with the blue wire with the white stripe from the car equalizer, to the blue wire on wiring harness. Then find the yellow wire on the wiring harness and connect the yellow wire from the car equalizer to the yellow wire found on the wiring harness.
6) Once you have connected all three wires, using insulation tape, tape up the exposed copper braid of all of the wires because this prevents them touching each other and causing a short circuit or an electrical fire while you are driving.
7) Turn on the cars ignition, to test the equipment, so power on the car radio and the car equalizer should automatically power on as well. If it doesn't come on, then check the fuse in the fuse holder for the car equalizer, usually found along the yellow wire, as it could be burnt out and check that you have connected the wires correctly.
8) If the car equalizer turns on, or you have solved the problem why it wasn't working, you can then replace the head unit back into the mounting cage, this is by pushing it forward and then fit the fascia trim back on.