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Bavarian Soundwerks' Mobile Electronics Forum
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Old 05-18-2009, 04:26 PM   #1
Burninrubba
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Help, Amp problem

Ok so I just installed my amp with a sub in my trunk. Got everything install and works great. However, my amp stays on even when my car is off. I tapped the remote wire (white) from the stock amp. It reads 10volts when car is on and 9volts when the car is off. I tested all the other wires. This seems like its the right wire based on what everyone says. But my amp shouldn't be on when the car is off right? I don't want my battery to die on me.

thanks!
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Old 05-18-2009, 07:04 PM   #2
Burninrubba
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sorry for the bump but i found my solution on bimmerforums. If anyone else had this problem try this

http://forums.bimmerforums.com/forum....php?p=4265324

Now if I could only find out how to fix that relay instead of running wires from the 12v switched..
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Old 05-19-2009, 12:46 PM   #3
ca1242
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There is no relay. Radio supplies 12v signal directly to the amp + antenna amplifier.

Are you sure you tapped into the correct wire? On some cars, there are more than 1 white wires.
Disconnect load (aftermarket amp) and test wire again. if it works fine, the amp might be overloading the radio's output, you need to add a relay.
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Old 05-19-2009, 01:28 PM   #4
Burninrubba
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well I completely disconnected the whole sub amp and all the wires and tested all the wires going to the stock amp including the other white wire which read 0 volts with the ign on and off. As stated above the white wire that did give out voltage for but some reason was reading pretty much the same voltage when the car was off and when the car was on. From what I can remember this only started happening when my stereo all of a sudden didn't work one day that I was driving. It came back on 10mins later and worked fine after that. I later started hearing these high pitch sounds whenever I started or turned off the car (same symptoms as stated in the link).

With the amp light staying on even with the car off, the car died eventually within a week. Maybe I fried something by accident? So I tapped the 12volt switched just as the person did on the link, and the amp turns off when the car is off and on when the car is on. I also cut and tapped the switched wire to the stock amp because I figured it was also staying on when the car is off as well. Everything works, so far so good for 2 days. If I could figure out what the real cause is. That would make me feel a bit safer.

thanks

Last edited by Burninrubba; 05-19-2009 at 01:43 PM.
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Old 05-19-2009, 04:48 PM   #5
ca1242
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Probably damaged the radio's turn-on output circuit. most likely, oem amplifier + antenna amplifier stay on as well, so they could drain the battery.
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Old 05-20-2009, 09:10 AM   #6
Burninrubba
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yeah I figured something wasn't right. Thanks CA for your help
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