activating stock 5kcstq power antenna?

[auditude at neta.com]

I put an Aiwa CDC-MP3 in my '88 5kcstq.  However, I haven't 
hooked up the factory antenna amp or signal for extension.

I still suck at Bentley wiring diagram interpretation, so I was 
wondering if someone could just tell me which wires to connect to 
the amp signal output of my head unit.  I've been listening only to 
cd's, because it has no reception.

Thanks,

Ken