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I have a 1999 Ford Expedition. My left front speaker has no sound. I tested the speaker separate from the truck and it works. Also my subwoofer has no sound. I have not tested the speaker yet. The subwoofer amp does have power to it. The sub amp is located by subwoofer in rear of vehicle. According to a wiring diagram i have there is a stock amplifier between the radio and all speakers, which also feeds the "sound" to the sub amp. But some thing i read on the web said its amp was built into the radio. So where is the amp! The wires coming out of the radio don't match the wires at the speaker, so it makes me think there is something between them. Where is the amp?!

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 631 Answers

SOURCE: No power output

Set the meter to AC volts and measure the AC voltage on the RCA cables where they plug into the amplifier. The black meter leat will go on the shield ground of the RCA cable. The red lead on the center conductor. You may have to turn the volume up to get a reading on the meter. At high volume, you should read at least one volt but the actual voltage will vary due to the audio signal. If you get no voltage on the RCAs, measure the AC voltage on the input to the LOC. Let me know what you find.

Posted on Oct 05, 2007

alicantecoli
  • 22133 Answers

SOURCE: Front Speakers And Stock Sub Stop Working HelP!!!

do you need all this noise whilst driving the car,could you hear an emergency vehicle ??check the fuses first and connections ,try speakers direct to radio

Posted on Nov 13, 2008

  • 290 Answers

SOURCE: needing wiring diagram for 1991 dodge dynasty le

here is what I found:
http://www.the12volt.com/installbay/stereodetail/715.html

Posted on Mar 26, 2009

rteemon
  • 578 Answers

SOURCE: wiring confusion

yellow constant
red switch
black is ground
blue power antenna if any
dimmer i/illumination is optional

front- right-red/green-+
front-left-blue/green-+
rear-right-red/yellow-+
rear-left-blue/yellow-+

these are all the positive side wire for all your spkr


Posted on Jun 25, 2009

  • 16 Answers

SOURCE: 2002 Ford Explorer Sport - Blown Subwoofer

yes you can replace it but is gonna be costly,because your gonna need a box plus the new woofer,any after market will not fit plus will require more power ,so your gonna need a bigger amp,plus wiring etc,,,,,re consider using a factory sub again or replace the sub plus the amp..check the replacements and amps at crutchfield..good luck

Posted on Jul 10, 2009

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