when i bought my car it already had a aftermarket cd player installed. the radio reception has always been complete *** and i decided to fix this. i got a powered antenna adaptor with the built-in signal booster and attached to the factory antenna wire and plugged into my aftermarket deck. i spliced the wire from the antenna adaptor into the red 12vdc wire going into the deck. it helped a little bit, but reception still pretty much sucks. my question is this....the factory antenna also has another black wire that is ran in the wiring bundle with it but it is not plugged into anything. i know it acts as a seperate input into the factory stereo's but there is nowhere for that wire to go on aftermarket decks. what is this wire? is it just a ground for the factory antenna signal booster? or is it the factory signal booster input itself? where do i need to plug this wire into?

 

so nobody has any idea what this wire is????

 

i guess not, but i am curious as to how youll fix this- i have the same issue. i think im just going to go with satellite radio though.

 

i believe you have a factory amplified antenna. i work at circuit city so i have access to sites with specific info about this stuff. audis and vw's sometimes need a special antenna adapter the looks like a regular vw adapter with an extra wire coming out of it. it is metra part 40vw53. http://metraonline.com/fitl.aspx that is the address to the part. you could always stop by your local circuit city (or best buy if you must cause they carry metra too) and give them this sku: met 40vw53. if the adapter looks right, buy it and hook up that extra wire coming off the factory antenna to the extra wire on the adapter