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Running wires through the air vents

3K views 30 replies 16 participants last post by  will228  
#1 ·
Is it a good idea to run wires from an XM radio through the air vents? I have to get the wires from the XM antenna on the rollbar back to the radio and I am thinking about using the air vents. Will the heat from a TJ's hellish heater core damage (or possibly melt) the rubber coating on those wires down the road?

Awhile back I wired some fog lights and got my feed from the accessory line in the glove box. To get to the wires back through the engine bay I went out the bottom of the glove box > across and through the floor heater ducts > behind the clutch, gas and brake pedals > and out the rubber-grommeted hole.

During one cold morning I had to pull over and search for the cause of that awful burning smell. It turned out to be the burning wire running through the floor heater vents. I re-routed it to go under the floor heater ducts instead of through them.

Anyone use the air vents when wiring a satellite radio?
 
#2 ·
I would not run wires to the air vents. Run it behind the dash, to the floor, along the floor pan, and up the rollbar... any way you have to do it. It may take a while, but nothing beats a good wiring job.
 
#15 ·
Hawkeye7 said:
Better advice.

Take it to a professional to install.
No way, he can handle it himself. :thumbsup:
 
#16 ·
Rocky529 said:
No way, he can handle it himself. :thumbsup:
i find i always learn more after i screw something up anyway
 
#17 ·
dzntzhellfire said:
do you have any idea what your talking about? the satelite signal runs through fiber optic style wires just like your TV
Apparently I don't. I was under the impression that the XM antenna used a metal-conductor, coax cable.

As far as my TV goes, I have s-video, composite, and coax cables.

What brand of antenna and receiver are you using? I'd love to learn more about it.
 
#19 ·
CapnDik said:
Apparently I don't. I was under the impression that the XM antenna used a metal-conductor, coax cable.

As far as my TV goes, I have s-video, composite, and coax cables.

What brand of antenna and receiver are you using? I'd love to learn more about it.
FM does but XM dont, and TV alot of cable companies including time warner and any company using all digital is a fiber optic cable. and i have the complete pioneer setup from radio to xm reciver to antenna
 
#20 ·
I can find no info on the antenna being fiber optic, but I would imagine it isn't, it's just too impractical.

First, fiber is very sensitive to bending. Second, converting a the digital stream from the air into light isn't a "free" conversion, so the antenna would have to be powered. Third, why would they do that, coax is more than capable, and a heck of a lot cheaper.

the satelite signal runs through fiber optic style wires just like your TV
Every single satellite installation I've done uses coax to hook up the receiver to the dish. Not once have I seen a fiber connection between these two.

FM does but XM dont, and TV alot of cable companies including time warner and any company using all digital is a fiber optic cable. and i have the complete pioneer setup from radio to xm reciver to antenna
I've got digital cable, and it's coax. I've also got DishTV, and it's coax too.

So, I'd really like to see the documentation saying that the antenna is connected to the receiver via a fiber link.

What equipment do you have? Specifically?
 
#21 ·
jmcbroom2 said:
I can find no info on the antenna being fiber optic, but I would imagine it isn't, it's just too impractical.

First, fiber is very sensitive to bending. Second, converting a the digital stream from the air into light isn't a "free" conversion, so the antenna would have to be powered. Third, why would they do that, coax is more than capable, and a heck of a lot cheaper.

Every single satellite installation I've done uses coax to hook up the receiver to the dish. Not once have I seen a fiber connection between these two.

I've got digital cable, and it's coax. I've also got DishTV, and it's coax too.

So, I'd really like to see the documentation saying that the antenna is connected to the receiver via a fiber link.
i was told a fiber optic style, and i will see if i cant find directions where it said not to cut the wire,
 
#22 ·
dzntzhellfire said:
TV alot of cable companies including time warner and any company using all digital is a fiber optic cable.
Fiber to the local hub near you, it's still coax into your cable box and then whatever piece out your TV supports. Even with HD, it's still coax into your cable box.

Fiber to the antenna is also unlikely, though it's not impractical.

jmcbroom2 said:
First, fiber is very sensitive to bending. Second, converting a the digital stream from the air into light isn't a "free" conversion, so the antenna would have to be powered. Third, why would they do that, coax is more than capable, and a heck of a lot cheaper.
Point 2 is valid. Point 1, depends on the fiber they are using. Ever look at the optical cable you can use between your audio components in your home theater setup? You can pretty much bend those cables every which way. However, you shouldn't bend coax just the same as you change the noise properties. #3, same as #1, in that if you look at those fiber pieces for home audio, the prices have dropped significantly.

However, they could be using a powered antenna. It wouldn't take but a few volts, probably 5v to get it to work with that kind of setup. So inside the cable could be three lines. One optical, one a positive voltage, the other ground..
 
#23 ·
dzntzhellfire said:
i was told a fiber optic style, and i will see if i cant find directions where it said not to cut the wire,
Just because it says not to cut the wire does not mean it's fiber. Hell, my Fishfinder instructions told me not to cut the transducer wire. It's just a standard coax cable, not fiber.

The reason they tell you not to cut the wire is that it takes special care to splice the cables back together WHILE reducing the introduction of interference. That's all....
 
#24 ·
XabuJr said:
Fiber to the local hub near you, it's still coax into your cable box and then whatever piece out your TV supports. Even with HD, it's still coax into your cable box.
.
My point was, just because it's digital does not mean it has to be transmitted over fiber.

And I do not believe your comment (that was edited out) about the use of fiber to reduce interference. In the typical length required for in car installation, the use of high quality coax is just fine, and a lot cheaper than fiber.
 
#25 ·
jmcbroom2 said:
And I do not believe your comment (that was edited out) about the use of fiber to reduce interference. In the typical length required for in car installation, the use of high quality coax is just fine, and a lot cheaper than fiber.
Yeah, I thought about that when I put it in there.. Which is why it's edited out :thumbsup:
 
#26 ·
So, we go from having a single coax cable from the antenna to the receiver to having 3, two power and one fiber.

What are they gaining by doing that? Have you ever priced a Fiber gbic? They aren't cheap, and you would essentially need two of them for this setup - one in the antenna and another in the receiver. Well, maybe not in the receiver, but you see my point. Why would they do that when coax is highly capable?