Aftermarket stereo wiring

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Alfadog
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Aftermarket stereo wiring

Postby Alfadog » Sun Oct 14, 2007 4:41 pm

Hey guys,
I've just finished wiring in my new stereo... however I have one wire left over from the old tape/radio deck! It's red and marked as 'NC' on the wiring diagram (see below).

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Does anyone know what it actually is!? The only other NC that was wired up was (d) (green) which I found was the wire to the auto aerial motor.
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Postby PUR157 » Sun Oct 14, 2007 8:18 pm

No Connection?
Oneness of Man and Machine
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Alfadog
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Postby Alfadog » Sun Oct 14, 2007 11:56 pm

That's all I can think of too, but wondering why the other NC I did have was actually the antenna wire ... and this is the only one of the wires marked as NC that actually was connected to the old unit.

It's all installed and working but maybe I'm missing something :|
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Postby marcusus » Mon Oct 15, 2007 7:55 pm

NC usually means not connected. Odd that the antenna was actually connected.

The only other wire I can think of is a dimmer wire for when you adjust the brightness of the instrument lights, but that might be TNS.
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Postby bruce » Tue Oct 16, 2007 11:28 am

If you apply power to it your car does a Transformers and changes into a brand new NC !
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Re:

Postby Alfadog » Tue Oct 16, 2007 8:10 pm

bruce wrote:If you apply power to it your car does a Transformers and changes into a brand new NC !

Oh damn! Better leave it unconnected then. :lol:

The only other wire I can think of is a dimmer wire for when you adjust the brightness of the instrument lights, but that might be TNS.

Yup, TNS is the one. I connected it though and it doesn't work... doesn't worry me too much as I don't see the point of dimming interior lights any darker than the brightest setting (which is dark in MX-5 anyway).
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Re:

Postby marcusus » Tue Oct 16, 2007 10:24 pm

Alfadog wrote:Yup, TNS is the one. I connected it though and it doesn't work... doesn't worry me too much as I don't see the point of dimming interior lights any darker than the brightest setting (which is dark in MX-5 anyway).

The head unit itself has to support the functionality as well, so that may be why it doesn't work.

Oh well. If it's all working, no harm done in leaving it disconnected.
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Postby Alfadog » Wed Oct 17, 2007 9:22 am

If the head unit didn't support it it wouldn't have a wire for it either though surely. It's marked on the installation diagram...
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Re:

Postby marcusus » Wed Oct 17, 2007 7:40 pm

Alfadog wrote:If the head unit didn't support it it wouldn't have a wire for it either though surely. It's marked on the installation diagram...

Yeah true. Well, whatever. If it's marked as NC for the unit, and everything's working, problem solved.
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Postby Alfadog » Wed Oct 17, 2007 9:19 pm

Yup, I'm not really too concerned, just thought it might have been a known problem/scenario. Cheers :)
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