BMW 740il with no sound!
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=20323
Printed Date: July 13, 2025 at 9:36 AM
Topic: BMW 740il with no sound!
Posted By: Ishinc
Subject: BMW 740il with no sound!
Date Posted: October 19, 2003 at 10:28 PM
hey, i have another problem! i have a 1995 BMW 740il and i can turn on the radio but there will be no sound at all. i can change the stations and all but just no sound what do you guys think? what should i check for? it is all stock so maybe the stock amp? thanks!
Replies:
Posted By: auex
Date Posted: October 19, 2003 at 10:35 PM
You should start with the fuses.
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Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: Alpine Guy
Date Posted: October 20, 2003 at 9:38 PM
ya, possibly the amps fuse is blown, other than that your deck may have just decided to stop sending signals
Posted By: kenmci
Date Posted: October 20, 2003 at 9:44 PM
if it is factory amplified make sure that you have hooked up the remote turn on wire from the deck to the amp.
Posted By: Ishinc
Date Posted: October 21, 2003 at 12:45 AM
thanks, i'll give the fuses a try, does anybody know if bmw factory amps have a seperate fuse? any other ideas?
Posted By: allchromed01r1
Date Posted: October 21, 2003 at 9:53 PM
I am going to have to go with Kenmci on this, im guessing the remote turn on for the factory amp wasnt hooked up.
Posted By: Ishinc
Date Posted: October 22, 2003 at 1:52 AM
since this is all factory stuff anybody know which wire is the remote turn on?
Posted By: auex
Date Posted: October 22, 2003 at 8:13 AM
ISHINC wrote:
it is all stock so maybe the stock amp? thanks!
It is Factory, do you really think that the manufacturer didn't hook this wire up? ------------- Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: Ishinc
Date Posted: October 22, 2003 at 4:04 PM
thats what i was thinking, maybe it came off? becuase the radio worked well before, dang BMWs and it's electrical problems...is there any way test whats wrong?
Posted By: Alpine Guy
Date Posted: October 22, 2003 at 7:55 PM
locate the factory amp, and test the wires with a light bulb tester when the radio is off. There should be one power wire. Then test it with the radio on, there then should be 6 powerd up wires. See what happends there.
Posted By: auex
Date Posted: October 22, 2003 at 9:45 PM
The factory amp should be in the drivers rear quarter panel behind a removable panel, or behind the trunk liner.
-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.
I've been sick lately, sorry I won't be on much.
Posted By: promodeepcycle
Date Posted: October 22, 2003 at 10:22 PM
pull rear seat there are 2 amps behind back of seat ... MUST PULL SEAT the white wire is amp turn on
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dont be a pet monkey ..use your dmm
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