Q:I have two white wires left...one is a speaker wire and the other is the constant 12v wire and I don't know which is which. They are the same thickness so unless one of you guys know I'm pretty much screwed here. Also, I have a black ground wire sticking out of the wiring harness and the ground wire from my stereo harness doesn't look like they should attach to each other. This is my first install and I've got everything else hooked up. Just need some pointers.

How would we be able to tell you the difference between two identical white wires? Use the one on the left? Use a volt meter, and find out which wire has voltage on it. A speaker wire won't test with voltage, a constant power wire will. You can always connect the head unit's ground wire to a metal point on the sub-dash. Edit: if you don't want to use the factory ground wire, it doesn't really need to be connected to anything. I suppose you could attach it to the same spot you connect the head unit's ground wire.

Q:a difference of 25 feet with 16 gague wire

You are not going to notice any difference at all at the length of 25 feet. If you are going to have 100 feet length then I would advice using a 14 gauge wire. It is not going to have any affect on your amp. Only the speaker resistance will have an affect on your power amplifier. Hope this will help you out.

Q:What does insulated wire do?How does it differ from regular wire used on breadboards?

Insulated wire is .... insulated. That is, it has a layer of plastic or rubber around it so that there is no exposed metal (except at the ends) and thus minimizes the shock hazard, and also helps prevent accidental shorts between wires. Non insulated wire is bare, it has no insulation, it's just a thin copper bar. You can use either on breadboards, so I don't know what you mean by regular wire. .

Q:I have a '78 jeep cj7 with points type ignition, I was wanting someone to explain exactly how to wire up the coil, starting with the 3 wires from the ignition switch.

Just go to Summit Racing Equipment online and get either a factory replacement or an aftermarket that has the factory hook ups so you don't have to figure out the wiring. Are you replacing the wiring? is it damaged? You might try painless wiring and see if they have a wiring system for it. Or get a manual with a wiring diagram.

Q:I need to buy some electrical wire for my car, does it matter what color the copper wire is inside of ( i.e. black,yellow,red,green,blue,etc.)

Color in electronics wire does not matter. It is simply so you can trace that the blue wire goes from here to there. Generally the Black is ground and Red is supply. In house AC wiring the black is hot, white is ground or neutral and green is earth or frame ground.

Q:The power supply is at the fixture in this case. I have 2 black wires (1 is the hot, I connected the hot to the other black to continue to the switch. The other wires are 2 white wires, 1 red wire and 2 grounds. At the switch there are multiple wires, including 3 black wires, 1 red, 3 white and 3 ground. One of the black wires I know goes on to other fixtures in another room. My issue now is I cannot get my main fixture I was trying to change the switch on to work and don't know which wire to connect to the switch. Right now I have removed the switch completely so the other rooms lights will work. Here is how I have it set up now. At the fixture black to black, white to white, red capped 2 grounds capped together. At the switch area: Black (hot from the fixture) to 2 blacks, all 3 whites connected, red is capped, and grounds are together. Which wires do I connect to the switch to control the fixture and still allow the other rooms lights to work. HELP!

The key is the red wire. At the switch junction, attach the red wire to one terminal of the switch. Combine all the black wires into one bundle and pigtail off a length of wire to attach to the other terminal on the switch. The black wires are now all constant hot, and the red wire is the switch leg going up to the fixture. The white wires should remain bundled by themselves. The bundle of ground wires can also be attached to the green ground terminal on the switch if one is present. At the fixture junction, bundle all white wires together and do the same with the ground wires. Attach the red switch leg to the black fixture wire. The remaining black wires in the junction should be bundled together to remain isolated from the fixture.

Q:When wiring my subs from a positive to negative coil, do I use positive or negative speaker wire?

Speaker wire is speaker wire. There's no difference between positive and negative wire except the markings on the jacket. If you're talking about the bridge wire when wiring a dual voice coil subwoofer in series, just use any piece of wire that's the same gauge as the wires between the other subwoofer terminals and the box terminals.

Q:Will you please remove any of the wires? The edge of the body, which is made of wire or what? Is it copper or iron?

In general, without power is not power, but like a small generator inside the copper wire continuously cutting magnetic lines under the condition of current will produce a certain direction, and the wood is not to produce electricity and friction sparks

Q:I Have a 02 Dodge ram with the 5.9L engine and i purchased a O2 simulator because i wanted to remove the cats. what i need to know is which wire is the Signal, 12 volt, and the ground wire on the oxygen sensor. If anyone has any idea please share some info.

The wires should be color coated. Usually if it is a 4 wire o2 there are two white wires and two black wires and the blacks are both grounds. Same should go with the 2 wire o2 the black is usually the ground and the wite is the 12v wire.

Q:trying to put in a different radio, and take out the original radio, but don't know which wires are which. i tried doing it myself already, and now when i turn on my headlights, the taillights don't come on? but the turn signals come on and so do the hazards. did i snip a wrong wire or did one come loose?i only cut the wires that were attached to the stock radio.help please!thanks!

reconnedt the wires as you cut them and buy a 10 dollar plug adapter and make life easy for yourself. you can buy them at any parts store , wal-mart, ect.