2004 volvo s40 oem amp

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Forum Name: Vehicle Wiring Information & File Requests
Forum Discription: Request Car Alarm, Car Stereo, Cruise Control, Remote Starter, Navigation, Mobile Video, and Other Vehicle Specific Wiring Info, Manuals, Tech Tips
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=123135
Printed Date: May 13, 2025 at 7:55 AM

Topic: 2004 volvo s40 oem amp

Posted By: fut614
Subject: 2004 volvo s40 oem amp
Date Posted: August 16, 2010 at 9:21 AM

I tried to replace the radio and now I only get the dash speakers (tweeters) to play any audio.

Is there an amplifier in the car that needs to be powered up? If so where would it be located

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FutureShop Cambridge

Replies:

Posted By: i am an idiot
Date Posted: August 16, 2010 at 5:43 PM

According to Audiovox, there is a red wire at the radio plug. They have it labeled Power Antenna, If the car is not fitted with a power antenna, this may be the amp turn on wire.

Posted By: fut614
Date Posted: August 18, 2010 at 9:14 AM

ya i tried that. I found the factory amplifier in the trunk. Passenger side. There was power at the amp but no audio. I think i blew the amp.

Do you know if it is like certain ford amplifiers that require 5Volts instead of 12 to turn on.

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FutureShop Cambridge

Posted By: i am an idiot
Date Posted: August 18, 2010 at 9:47 AM

12 volts on a ford amplifier does not hurt the amp, it simply makes for a very loud turn on pop. Did you check for 2 separate wires with 12 volts on them? One is the constant power and the other will be the remote turn on.

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