Audio Systems: 92 Ford Taurus Premium Radio, exact model number, amp circuits

Question
I have a 92 Ford Taurus Station Wagon with a Premium JBL Sound System.  The original radio went west on me, the radio only coming on long enough to raise the power antenna a few inches before it shuts down again and the antenna retracts.

I have purchased a replacement radio control body, matching part numbers, pins, and cables.  When I power up with the new unit, the antenna rises, the radio and cd unit illuminate, stations lock and the unit seems to function perfectly.  

Except that not a sound comes from the unit.  This was not the problem with the original head.  Are the amps matched to the head, or have I shorted an inline fuse somewhere?  I would appreciate any insight you might have.  

Thank you.

David Hudson  

Answer
David,
If the replacement radio/stereo is the exact model number and all the plugs are plugged in, the problem with no sound may be due to one of the following reasons. 1-The amp circuits in the replacement stereo are faulty. 2-The power lead from the replacement stereo that controls the external amp is not working.

TOM,
T&D ELECTRONICS
tdeser@zoominternet.net