There was no DIN connected to HU-555, so I think subwoofers amp takes signal from speaker wires.
https://www.matthewsvolvosite.com/fo...ic.php?t=30204
Here on another forum someone suggested that the red-and-black is the remote wire color for subwoofer.
Would it be a bad idea to just try connect the blue remote wire from the new head unit to Volvo's original connectors red and blue wire? I mean after all there is fuses everywhere...
