Saab Problems? Ask a Mechanic for Answers ASAP
Hello, my name is ***** ***** I am a professional here at Just Answer. I have noticed that your question was not getting a response and thought I would see if you still need help with this.I apologize for the delay and I hope I can still assist you with this here.If you are sure the fuse are okay then check for power and ground at the connector on the unit , if you fine you have power and ground and it still not turn on then in most cases that usually means the unit has failed. See the wiring diagram in the link below for power and ground wiring,https://dl.dropboxusercontent.com/u/104923897/Audio%20wiring%20Nov%204.pdf
Both power supply wire power the main unit, check and see if you have power on both wires. The unit can still be bad and lite up.