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Re: Installing 4 after market speakers in my Ford F-350....
This is actually a quotation from a site on the net as i've wondered about it to
"Speaker wire has a mark or strip on one of the conductors this is to indicate polarity of the wire. When installing speakers to the output of an amplifier you need to observe the proper polarity. This is particularly important when installing a surround sound system with front and rear speakers. If the polarity is not followed then the results will be poor balance of sound and even cancellation of some frequencies."
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the after market might of had the wires crossed for the speakers.. try switching the wire speakers around to make contact one at a time. If you still cant get sound from one after doing that, you might have to bypass with an amp
I assume this is an aftermarket radio and you don't know the connections?
Normally, the red is + and the black -. A yellow wire usually is a feed to a power amp to turn it on when the radio goes on.
On the speaker side, you should have paired up wires like:
Yellow solid and yellow w/black stripe
Brown solid and brown with black stripe
Green soild and green with black stripe... you get the idea. The solid color wire is the positive and the balck striped match is the negative.
There should be 8 speaker wires altogether to give you L/R fron and L/R rear.
If you don't know which terminal is positive and negative on your speakers, try this;
Take a 1-1/2 volt AA battery and connect it to a speaker momentarily ( I do mean momentarily or you'll blow it). If the speaker cone moves out away from the magnet then the terminals match the polarity of the battery - and +.
If the cone moves towards the magnet the polarity is reversed. It is important you connect the speaker phasing (polarity) correctly other wise you will get poor bass output.
Whatever you do, do not ground any speaker wires!!!!
i cant tell you what colors are what but you can find out with a cheap test light and AA battry first turn the ignition on and find a good ground.. A screw or bolt in dash that goes it to something metal and attach the non pointer end of the test light to that spot.. than touch each wire lead one at a time once you find one the test light will light.. write down the colors on a piece of paper once you find 2 or mabey 3 power wires and have written down the colors. now shut the ignition off and test thoes wires again and find the only that still has power.. that is your constant or memory lead.. the other is ignition switching.. now the other wires that did not have power.. try toucging the AAA battery to colors and listen for a speaker cherp, and continue witing doun location untill you have each speaker colors found now attach the test light to the memory wire and touch one of the last remaining wires untill you have a flash of the test light that is your ground.. If in the earler color serching you found 3 power wires than one is from the dash dimmer attach tghe test light to ground wire and find whitch of the two dims with the dash.... thats about it except finding the polarity of each speaker and that can be done by listining to it as youhook up each speaker and if base responce is going away as you hook up each one at a time than switch the wires to that speaker and you will here the bass response return
Get a AA battery, solder a wire ti each end. This is called a "popper"
Hold one wire of the AA on one speaker wire. Tap the other AA wire to the other speaker wire. The speaker will make a "popping" noise. Mark the wire as to the location, and so on. To determine polarity (- or +) you must be able to see the speaker. If it jumps UP when you "pop" it, look at the polarity of the AA battery.
That is the proper polarity of the wires. If it sucks IN, when you "pop" it........you're backwards. If this is over you're head......$30 @ a stereo store and it's over!.....Have fun.
you can get something called a wiring harness from Walmart (or any place that sells car audio equipment). you plug it into the factory connection that would normally go to the back of the radio, and it has the wires labeled and color coded with what goes where. most times all you would need to do is match up the colors from the harness to the new radio you're trying to install. it makes it really easy to install after market radios, which im assuming you're trying to do.