Zune car charger pinouts & modding Ipod car charger

[Guest daaudiome]

Hi guys I just bought an Ipod car charger cause I don't have any zune car chargers available where I live, this ipod car charger outputs 5volts , I've ripped it open and found out pinouts from the usb connector on the car charger goes as follows

1 = 5volts dc ( should be +5 )

2 = no connection (should be - data)

3 = soldered to ground (should be + data)

4 = soldered to ground (should be Ground )

so Any ideas , I don't really understand what's going on I tried measuring voltage on pinouts from an usb port from a computer, without being inside XP , just to see which are the voltages and I got 5 volts all over pinounts 1,2,3, and 4 being ground. So please need some help from you guys

I already grounded pins 2-3-4 and it still doesn't charge.. I tried an axim x5 with the charger and charges without any probs.