'99 Toyota Avalon Common Negative

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georgiacanon

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Joined: September 01, 2006

Location: United States

Posted: September 01, 2006 at 9:07 PM / IP Logged

I am trying to install a Alpine head unit into a '99 Toyota Avalon with a Factory Amplied Premium Stereo. I am using a Best wiring harness. Model# BHA8110. The problem is I can not find the common negative wire for the front and rear speakers. Also the instructions that came with the harness recommends I use a Periperal SVEN4 to interface the factory amplified system. I have installed alot of head units this is the first one that does not seem to be pretty staight forward. I would appreciate any help or ideas.

Thanks,

Robbie

georgiacanon

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Joined: September 01, 2006

Location: United States

Posted: September 01, 2006 at 9:14 PM / IP Logged

This system has 4 separate positve inputs and one common negative. I cannot figure out where to hook the 4 negative output wires from the head unit to.

KarTuneMan

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Posted: September 02, 2006 at 11:04 AM / IP Logged

https://www.the12volt.com/installbay/detail.asp?info=alarm&year=1999&make=Toyota&model=Avalon&ID=18947&type=Stereo

tcss

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Joined: June 07, 2004

Location: United States

Posted: September 02, 2006 at 3:32 PM / IP Logged

Those are the wire colors AFTER the factory amp. Could it be that he is using a preamp input harness and the common ground is for the grounds on the decks RCAs which are hooked together? I'm not familiar with the Best harnesses.

There is no such thing as free installation!

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'99 Toyota Avalon Common Negative

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