playing my zune in my car

I can't get the music to come through all four speakers in my car. It only plays through the left side. An auto electronics rep from Best Buy said the male end of the cable is not making contact in the aux input in my car. But, this cable is standard 3.5. Does anyone has a solution? I NEED my music in my car!!

I don't think this is the problem but you may be using a mono cable. You need a stereo cable. The ends will have two plastic rings at each end.

It's probably just a faulty cable. Try another.

If your earphones play on both sides through the Zune, you'll know that the Zune input is not the problem.

If you know that you have a good cable, plug another device, like a portable cd player, into the car input. If the problem persists, the car input is faulty.
 
These things will help to point to where the problem is. 

I have found that most of the cables being sold are junk, unfortunately.  They seem to be loose. Good Luck!