installing an sub and amp

[SyHightower]

Taken from the adding sub guide. -

"2) X5 non premium (no DSP): You should see 12 pins in this connector even if all pins are not wired. Picture 5 below shows the wiring of this connector. You can tap into pin # 5 and 6 or 11 and 12 to feed the high level (speaker level) inputs of your subwoofer amp. As explained in the previous section if you have a 2 channel bridgeable sub amp you will be able to feed your amp’s high inputs from pin# 6(-)/5(+) for right speaker and 12(-) /11(+) for left speaker."


ive followed this to the letter, ive both left and right inputs on my amp so ive used all four. ive installed a phono socket speaker line output converter to provide pre amp level output. (i also tested withoutto high level inputs) but i am still unable to get any sound output into my amp.

My car is a brand new UK X5, with just basic business CD, can anyone help?????

any help would be great!

Thanks

Simon