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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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Need help finding out which termanals are which on my audiobahn subwoofer

Touch a 9v battery to the speaker terminals for a second. If the speaker cone pops outward, note the polarity of the battery terminals. The + was on the + side of the speaker and - on the - side. If the speaker popped inward it's the opposite.

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Alot of amps and speaker crossover have protection circuits built into them so when you turn up the music to much it's there so you don't blow your speakers. Try turning down the gain on the amp if that does'nt work check your speaker wiring for out of phase meaning
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I have a 81 grand prix the radio wiring harness is not there thers just loose wires how do i fid the harness to hook the wires back up so i can add an after market harness and cd player

you need a volt meter and 9v battery. earth black contact from meter & then
  1. with ign off probe wire to find a live , thats the memory feed goes to yellow on radio
  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
  4. then get 9v battery and with remaining wires pair and connect to battery, when speaker buzz's mark pair as they are ( ie front right rear left etc ) the speaker wires from the new radio are paired by colour ( one with black stripe with is the negative of the pair)
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Where can I find the colour code for the wiring of a radio in a 2001 ford transit

the power feeds go to 1 block
get a test lamp and find the
switched live = goes to red
constent live = goes to yellow
ground earth = goes to black
speakers and dash display to 2nd block
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Dec 04, 2009 | Car Speakers & Subwoofers

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2003 avalanche rear passenger speaker not working

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Wiring color coding For RS tweeter

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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The volume or maybe the speakers in my 2002 hyundai sonata stopped working. Radio still comes on but no sound. What can I do.

if you happen to have a speaker available, try to test the stereo. plug in a speaker and see if it works. otherwise, i don't really like this method but, it does work... unlug your factory speaker and plug a 9v battery to the speaker, if you hear a little popping/wizzing sound, the speaker works and it's the head unit.
also, check to see if the radio has an amp. sometimes the radio will be operational, but the amp isn't and that is the problem. and the easy solution is to replace the radio with an after market of choice. factory radio's that are purchased seperately are rather expensive.

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1 Answer

I need radio color codes for a 2001 fordranger

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