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Car Audio Help
Wiring, Electrical & Installation
1987 Nissan Maxima stereo replacement help.
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<blockquote data-quote="keep_hope_alive" data-source="post: 8316271" data-attributes="member: 576029"><p>seems like the Scosche adapter doesn't properly interface with the stock amplified system.</p><p></p><p>figure that the stock radio feeds other components before feeding the speakers. one simple solution is to bypass the stock speaker wiring and just run new wiring from the new head unit to each of the speakers. this will ensure everything will work properly. i typically bypass factory amplification when making head unit changes.</p><p></p><p>another alternative is to try a different harness.</p><p></p><p><a href="http://www.metraonline.com/part/70-1764" target="_blank">Metra Part # 70-1764 | Nissan wire harness | Metra Online</a></p><p></p><p>you'll notice that this harness includes RCA output jacks to allow the new head unit to feed signals to the factory amplifiers. it also includes amplifier turn-on wiring (which is what the guy on the phone was trying to get you to do).</p><p></p><p>if the inputs to the stock amplifier are unbalanced, then it can be shorting out the aftermarket speaker outputs.</p><p></p><p>modern head units have a "balanced" or "differential" output - meaning there is signal on both positive and negative outputs. older stereos did not have that wiring method and the negative output was grounded. if you short a speaker wire on the aftermarket deck, it won't output sound (buy can stay on).</p><p></p><p>you can try the Metra harness for amplified 1987-1994 Nissan Maxima and probably have success Or you can just bypass all factory speaker wiring and wire each one directly. While you are in there, replacing the speakers is worth the effort (and a good use of the money you saved thanks to DIY).</p></blockquote><p></p>
[QUOTE="keep_hope_alive, post: 8316271, member: 576029"] seems like the Scosche adapter doesn't properly interface with the stock amplified system. figure that the stock radio feeds other components before feeding the speakers. one simple solution is to bypass the stock speaker wiring and just run new wiring from the new head unit to each of the speakers. this will ensure everything will work properly. i typically bypass factory amplification when making head unit changes. another alternative is to try a different harness. [URL="http://www.metraonline.com/part/70-1764"]Metra Part # 70-1764 | Nissan wire harness | Metra Online[/URL] you'll notice that this harness includes RCA output jacks to allow the new head unit to feed signals to the factory amplifiers. it also includes amplifier turn-on wiring (which is what the guy on the phone was trying to get you to do). if the inputs to the stock amplifier are unbalanced, then it can be shorting out the aftermarket speaker outputs. modern head units have a "balanced" or "differential" output - meaning there is signal on both positive and negative outputs. older stereos did not have that wiring method and the negative output was grounded. if you short a speaker wire on the aftermarket deck, it won't output sound (buy can stay on). you can try the Metra harness for amplified 1987-1994 Nissan Maxima and probably have success Or you can just bypass all factory speaker wiring and wire each one directly. While you are in there, replacing the speakers is worth the effort (and a good use of the money you saved thanks to DIY). [/QUOTE]
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1987 Nissan Maxima stereo replacement help.
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