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Testing with 9v battery

How do you do this? I am not very savy when it comes to this kind of stuff.

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Use the speaker wire postive wire and negative wire, touch the 9V battery + and - , you can hear the noise, then you will find out which speaker is. try it. I had a car stero company.

Posted on Jun 27, 2008

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you need a volt meter and 9v battery. earth black contact from meter & then
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  2. with ign on probe wires that the constent live goes to red on radio
  3. when lights on probe wires thats the illumination feed (if fitted to car, but not used on many new radios
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switched live = goes to red
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Different manufacturers use different wiring. Usually the striped is positive.
An easy test is to take a battery (from a cordless drill) or a 9V, and touch the neg + pos to the correct terminal of the battery.
If the speaker pops OUT, it is wired correctly, if the speaker pops IN, reverse the wires.

Thanks for using FixYa - A FixYa rating is appreciated!!

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I need radio color codes for a 2001 fordranger


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***Warning!!!!!! There's 2 yellow and 2 grey wires (other grey is dimmer). If the original factory harness is still there and not cut up, all the speakers will be next to each other on the plug(s). If not, you MUST test the wire(s) with a test light (or some other way), verify the 12 switched (yellow) incase a fuse is blown. Same with the dimmer lead, you need to turn up and down the dash dimmer to get a response from that wire. If you use the wrong wires you will send 12V into the speaker leads from the radio and kill the radio!

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