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Location:
Newcastle, Australia
Registered:
August 2005
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Re: Ma70 aerial trigger
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Fri, 07 October 2005 08:22
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OK, here is a list of all the wires that plug into the factory antenna and what they do.
1. Blue/Red Accessory Power (Cigar Lighter fuse)
2. Black/Red (thin) Trigger 1 (Factory head unit)
3. Blue/Yellow Constant Power (dome light fuse)
4. Not Used
5. Pink/Blue Trigger 2 (factory head unit)
6. White/Black Chassis Earth
7. Black/red (Thick) Ignition On Power (ECU IG fuse)
So with your aftermarket aerial, it should have three wires coming off, usually Black, Red, and green.
Red goes to Blue/Yellow
Green goes to Black/Red (thin)
Black goes to White/Black (or vehicle chassis)
Yeah mic, most import stuff has FM diversity antenna's. My GZ-20 doesn't but my mates MA-70 does. Finding info on it is pretty hard as it was only ever big in Japan. From what I can gather, the theory is that the deck measures signal strength on both antenna's. It will use the primary (Vertical), most of the time, but if the signal level on the primary drops below the secondary it will switch over.
The properties of VHF FM signal allow it to bounce off hard objects to a degree and can cause the signal to go from a vertical alignment to a horizontal alignment in dense areas, (i.e Tokyo). As the secondary antenna in the glass is horizontal as opposed to the primary, it will give better reception in this scenario.
It still seems like a hell of alot of effort to go to just to listen to the radio, but I guess Japs will always take things to the extreme.
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| | Subject | Poster | Date |
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Ma70 aerial trigger
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Supra6 | Wed, 05 October 2005 07:03 |
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Re: Ma70 aerial trigger
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Allan | Wed, 05 October 2005 08:36 |
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Re: Ma70 aerial trigger
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HKS_TRD | Wed, 05 October 2005 08:46 |
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Re: Ma70 aerial trigger
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Allan | Wed, 05 October 2005 11:27 |
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Re: Ma70 aerial trigger
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GTtwin | Wed, 05 October 2005 23:45 |
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Re: Ma70 aerial trigger
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Supra6 | Fri, 07 October 2005 00:07 |
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Re: Ma70 aerial trigger
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mic* | Fri, 07 October 2005 01:29 |
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Re: Ma70 aerial trigger
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GTtwin | Fri, 07 October 2005 08:22 |
