I checked these to a 1991 Festiva electrical manual and by looking at the speaker connectors:
Hot at all times - WHT/RED
Hot in run or ACC - BLU/YEL
Interior lights - WHT/RED
Left rear speaker - GRN (+) & GRN/WHT
Left front speaker - BLU/ORG (+) & BLU/RED
Right rear speaker - GRN/YEL (+) & GRN/RED
Right front speaker - BLU/BLK (+) & BLU/WHT
Ground - BLK
Note about ground: my car has a short black wire that connects to the chassis at the rear of the space where the deck goes. This is in the electrical manual that I have so it's stock for the 91 Festiva.
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