95 conti, radio does not work

My 95 conti had the polarity reversed when a battery was changed.(painful story) A lot of the damage has been rectified (thanks Steve!) and the last remaining problem is the radio. It does not work, at all.
I replaced a relay that goes between the amp and subwoofer in the back and that was not the problem. Is it possible that one of those components was simply burned out?
Is there a way to check?
Any and all suggestions would be appreciated.
Jim

Hey Jim,
Glad to hear you've made progress with the other systems.
The section re Audio Systems Testing is HUGE but very specific.
How come you don't accept my offer to send you this 1996 Service CD?

Here's the main index in the diagnosis B section (no power) :
Keep in mind, this is just the index, and it's the B index, it runs A through M for "Sound System Function" so it's impractical for me to even attempt to reproduce the complete diagnosis procedures here.

Here's what leads us to section B:

Audio System Does Not Power Up While Ignition Switch is in ACC or RUN--No Display and No Audio

Possible Source(s):
Open front control unit fuses or power/ground connections.
Open rear chassis unit fuses or power/ground connection.
Circuit 1068 (LG/BK) open or short.
Circuit 832 (LB/PK) open or short between front control unit and rear chassis unit.
Circuit 833 (T) open or short between front control unit and rear chassis unit.

Action(s) to take:
* GO to «Pinpoint Test B


«1996 Continental Table of Contents»
«Group 15: AUDIO SYSTEMS»
«Section 15-00: Audio Systems--Service»
«DIAGNOSIS AND TESTING»

Pinpoint Tests -- Sound System Function

PINPOINT TEST B: AUDIO SYSTEM DOES NOT POWER UP WHILE IGNITION SWITCH IS IN ACC OR RUN--NO DISPLAY AND NO AUDIO

B1: CHECK FRONT CONTROL UNIT SUPPLY
B2: CHECK FUSE 2 OUTPUT
B3: CHECK FUSE 2 CONTINUITY
B4: CHECK SWITCHED SUPPLY
B5: CHECK FUSE 5 OUTPUT
B6: CHECK FUSE 5 CONTINUITY
B7: CHECK CIRCUIT 1002 (BK/PK) SUPPLY
B8: CHECK FUSE 4 OUTPUT
B9: CHECK FUSE 4 CONTINUITY
B10: CHECK CIRCUIT 57 (BK) CONTINUITY
B11: ALL CHECK CIRCUIT 694 (BK/LG) CONTINUITY
B12: CHECK REAR CHASSIS UNIT SUPPLY
B13: CHECK FUSE 15 OUTPUT
B14: CHECK FUSE 15 CONTINUITY
B15: CHECK CIRCUIT 694 (BK/LG) REAR CHASSIS UNIT CONNECTOR PIN C1-13, GROUND FOR OPEN
B16: CHECK CIRCUIT 694 (BK/LG) REAR CHASSIS UNIT PIN C1-12, GROUND FOR OPEN
B17: CHECK COMMUNICATION LINK
B18: CHECK DIGITAL AUDIO COMPACT DISC PLAYER FOR INTERNAL SHORT



Each one of these B** checks leads to a yes or no, which leads to the next procedure dependant on your answer.

Please allow me to send you this CD :)

PM me a mailing address, that's all.