Adding an iPod plug to my car: Part 2 the saga continues

So I finished adding the iPod plug to the car. I got all the wires to squish in behind the radio. I plugged the car battery back in and I turned on the car. The display lit up on the radio/CD player. This means that I at least didn't cut the power cable. Next, I put in a CD. First, you should note that my radio/CD player is really old and messed up. The time always has an extra digit and I have to try 10 different button combinations to get it to the CD mode. Anyways, once I got it on CD, it actually started to play the CD!!!! I flipped the switch and it stopped. This means that the switch isn't broken and I connected the radio/CD wires correctly to the switch. Next, I plugged the headphone cord into the iPod, turned the volume all the way up, and I flipped the switch. NOTHING....I pressed all the buttons in every combination I know possible and....NOTHING. This is very disappointing but better than my first attempt. I know that I wired half of it right. Next weekend, I will play around with the iPod cable wiring and see if I can get it to work correctly. It may have been where I connected the red and white wires from the iPod cable. I read online that red and white should correspond to right and left respectively. I think my problem might have been that I connected the red to right positive and right negative speaker, and I connected white to left positive and left negative speakers. I think instead, I should have connected the red to the right positive and the ground wire (which I just cut off the first time) to the right negative and the same for white). I don't know why I didn't think of that!!! Anyways, at least it wasn't a complete failure.