Amp not switching off
Posted: Tue May 26, 2026 8:56 am
I‘ve fitted a powered sub into my S8. I took the RCA feeds and switched live from the 25 pin plug for the factory Bose amplifier. I tested the switched live before splicing and all was good. What’s happening now is the amp isn’t turning off even with key out. However if I unplug the RCAs or the power plug to the wired sub it switches off and remains off. I used pin 3 (AF earth) for the RCA grounds. Could this be the issue?