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Old 11-02-2006, 10:19 AM   #1
bleuquila
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Default Is it possible to splice a FM radio antenna wire?

This is for a Legacy GT, the stock headunit has a thick wire running out of the back of it, that you can't unplug - it leads to the external antenna for FM reception. During an XM install a year or so ago, that antenna wire was cut. Well, now the XM is coming out and the car is being sold, so I'm looking for ways to get the FM back. Basically, there's a length of wire coming out of the back of the radio, and it needs a female connector to hook up with the existing male that's connected to the antenna. Is it within the realm of reason to somehow .. crimp / solder that sort of connection on? There's 2 layers of wire, I think, making it bit more challening than the usual wiring job.
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Old 11-02-2006, 02:14 PM   #2
Daishi00
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sure, just make sure to match up what wire goes where and you sould be fine.
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Old 11-02-2006, 04:06 PM   #3
lowranger
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if its like many antenae wires, then its split up into 2 areas. just like a cig lighter. the pos. is the single wire in the middle, and the sheething is the neg. IF its what im thinking about. otherwise i have no idea. i dont think u can. *shrugs.
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Old 11-02-2006, 05:25 PM   #4
Judge
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Its just a coax cable. The braided outter layer is the ground and the inner wire is signal. strip the coating back a ways...wrap the outter layer into a single strand on both ends and solder together. do the same for the inner wire. Use plenty of heat shrink and make it solid and you will be fine.
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Old 11-02-2006, 05:32 PM   #5
thedaddyb
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Who installed that . . . and why would they cut the antenna wire? Stupid stupid stupid.

The antenna plug can be found at the amplifier on the GT (and sometimes on the back pillar on the wagons)

You would just have to get the antenna adapters to be able to plug it in.

What's done is done though . . . so the antenna wire is just a standard coax cable. The tiny inner wire is you + signal and the shielding is your - connection. There is also an antenna turn on wire but that should not have been cut, depending on where the wire was tapped.
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Old 11-02-2006, 05:39 PM   #6
bleuquila
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Ok, thanks for the feedback. Wasn't me that cut it up Just trying to save the owner the cost of buying a freaking all-new 6-disc changer to get a working radio.
I know there are specific coax crimpers you can buy for $20-odd dollars, would that be helpful? I'd rather solder it up, personally, so what you've suggested, judge, makes sense. Is there a reason that the ground is in the form of a shield? - i.e. should I try and make the stretch where the signal wire is not shielded as short as possible?

Not that .. I wouldn't anyway, I'm just curious now.
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Old 11-02-2006, 06:16 PM   #7
thedaddyb
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soldering it is the best way to go. i've repaired a few that way before. the inner wire is going to be a pain, usually it is 30 gauge or smaller. tape it up so the shielding won't touch it and then I usually attach the shielding back over the inner wire as best as possible. Loosing an inch of shielding shouldn't affect the reception too much.
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Old 11-03-2006, 03:46 PM   #8
MTX05STI
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I have spliced 2 in my day, only because of accidents. Both times, it was a clean splice but you can tell that the signal quality suffers.
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Old 09-20-2019, 05:31 PM   #9
Mzsinko84
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I was in the process of switching radios and I found out that what I needed to switch the head units and keep the ac, heater, the front windshield and the rear window defogger I had to order the proper piece meant for switching CD players in that era of US Legacies from Japan. I ordered that piece, I have a poor CD player installed but now I need to find the wire that is ment for ac, heater, radio and clock memory because every time I start my car I have set the radio, ac and the heater. I don’t worry about the clock but I want to get that corrected. As far as I know, there’s 2 yellow wires and there’s 3 red wires.
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Old 09-20-2019, 05:32 PM   #10
Mzsinko84
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As far as I know, there’s 2 yellow wires and there’s 3 red wires.
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