Grand Caravan 97 Speaker Trouble

Changed the stock radio on my Grand Caravan to a Sony radio now the Infinity speakers don't sound. Can anyone help me with this? There is a
black wire with a dark green line in the harness that when I touch it to a
ground it makes a sound on the speakers. Is this wire for power or ground?
Or is there a fuse I should be looking for that is for the Infinity speakers? They are amplified. Thanks in advance...
BxJigster

Here is some info on the wiring and I think there is info on the Infinity on how to get it to work . You will need Adobe Acrobate Reader to look at it .
http://www.installdr.com/Harnesses/DCP-Wiring.pdf

Here is some info on the wiring and I think there is info on the Infinity on how to get it to work . You will need Adobe Acrobate Reader to look at it .
http://www.installdr.com/Harnesses/DCP-Wiring.pdf

Hey thanks. I am going to check it now. I will let you know how it goes.

Once again Thanks. I went to the link and actually went to the more detailed site and got a more detailed diagram for the harnass. The quick
reference was good but I had actually not thought of using the power
anttena wire because my van does not have a power anttena but I noticed
it said Power Ant/Amp. That did it!! Thanks. Also do you know of any
other sites like that one. My fathers Mercury Villager was not on it and I
want to wire up his radio this time I want to do it the right way..lol

Thanks Again...