2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Stereo Wire Identification in 90 Vert

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Old 12-30-11 | 10:45 AM
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From: HuntsVEGAS, AL
Stereo Wire Identification in 90 Vert

Before anyone says anything about "search", I DID... but there was nothing on the wires I'm trying to identify.

Now, on to the topic at hand...

The wires I'm trying to identify are listed as L/B (blue with black stripe) in the FSM wiring diagram and there's a wire in each harness. Now the 2 Metra wiring harnesses that plug into the factory ones, do not have corresponding wires for either L/B wires. Can someone please tell me what these 2 L/B wires are for? TIA.
Old 12-30-11 | 11:01 AM
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It appears that they go to the oem amplifier. They appear to be the ground lead (or +12v) to the amp.

I could be wrong but to me that's what the fsm diagram looks like.

Old 12-30-11 | 11:27 AM
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From: HuntsVEGAS, AL
Are you sure this is a 90 wiring diagram? Mine only shows a TYPE 1 audio system. But anyway, I circled the wires on your copy and they don't show a direct connection to any ground lead or 12v source.


Attached Thumbnails Stereo Wire Identification in 90 Vert-radiowiring-1a.jpg  
Old 12-30-11 | 12:16 PM
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S5 convertible w/o air bag would be the Type 1 audio system while w/airbag is the Type 2 audio system but both have the L/B wires.
Old 12-30-11 | 02:15 PM
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From: HuntsVEGAS, AL
Ok... so does anyone know what purpose the L/B wires are for?
Old 12-31-11 | 11:32 PM
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https://www.rx7club.com/showthread.p...+stereo+wiring
Old 01-01-12 | 08:27 AM
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From: HuntsVEGAS, AL
Originally Posted by misterstyx69


Not sure why you posted this link...
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