My daughter and son-in-law have a 2003 X5. They asked me to install an audio input jack, which I tackled today. Following the information here and the instructions that came with the audio input kit everything seemed to go smoothly. But when I turned the car back on, the MID was completely dead. Checked the fuse (is it #7?) and all the connections, but couldn't come up with a fix. Can any of you help, please.

Thanks.