I am reassembling a long term project 1989 780 Bertone for a friend (I did not take any of it apart) , currently am needing desperately the factory wiring diagram for OEM stock Radio system. It has the standard AM / FM Cassette, Equalizer, front 40 watt stereo amplifier (mounted above the left side / driver's side knee pad) ,and a trunk mounter 60 watt rear amplifier.

Any schematics of this 1989 780 model specific sound system would greatly be appreciated.

 

I am also looking for a 1990 Volvo 780 Bertone 4 Cyl Turbo V87 B230FT wiring diagram book. Rats had a field day and enjoyed the wiring so now I'm trying to put it back together. So if anyone know where I can download one from please let me know.