DIY: Scosche FM-MOD02 FM Modulator
Disclaimer:
These are some tips that have worked for me. If you follow these tips, you do so at your own risk. Please be careful and take all appropriate safety measures.
Last month I bought a used vehicle. Being a 2002 model year truck, it was not yet outfitted with any means to play an "iPod" like device. Since I am into the iPod Touch, I really wanted a way to play audio through the truck stereo. Some folks might suggest an FM transmitter. My experience with FM transmitters has been less than impressive. They are just not strong enough to keep a constant signal to the radio. In my opinion, don't waste your time with the transmitters. Also, I did not want to spend a ton of money on a new head unit, nor did I need anything more than the ability to play decent quality audio.
To solve this problem, I chose the solution I used in my Mustang. The solution is a Scosche FM Modulator. An FM modulator is a device that is installed in-line with your car antenna. Unlike the FM transmitters you sometimes see, this requires you remove the radio. That may sound daunting to some, but with a little research and patience it is well worth the time and effort.
The FM modulator provides a direct feed into the stereo on one of two modulation frequencies (87.9, 88.3). You will have to choose which one works for you in your area. There is a tiny switch on the side of the unit that lets you choose which frequency to use.
There are three basic things to hook up: the antenna, power and ground wires. I tapped into my fuse box for the power and used a self tapping screw on a metal support behind the dash. Probably the hardest part is sliding the radio out. For this you might need to consult a repair manual (like a Chilton's) at your local library.
The last thing to consider is the switch and input (pictured above). Compaired to previous Scosche versions of this product, this new one unit design integrates the switch and input jack in one little module. In past versions, there was s seperate switch and then a wire with a mini stereo jack that hung down behind the dash. This model is much cleaner.
To sum it up, if you want to hook an MP3 player to your stereo and are looking for a step above an FM Transmitter give this unit a try. I have been very happy with it. It is not fancy and the audio quality is not "pure" digital but for podcasts and audio books it is fantastic (music is not bad either). It is a nice middle ground for getting the audio into an older car stereo.
PS. I got mine at Amazon. Here is the link ...

