Alpine PSU-300MTG Installation Manual - Page 12

Ford Mustang ˜ 12/12 Troubleshooting Guide Symptom 1 System will not turn on 2 Volume is too loud with aftermarket headunit. Possible Cause Missing or blown fuse at the battery Radio's Remote Turn-On wire may be disconnected. Speaker level out is connected at the T-Harness. Amplifiers gain control has not been properly adjusted. 3 Subwoofer sounds very low. Gain level may be down to the lowest setting. Audio Phase may be reversed. 4 One of the speakers has no Disconnected pin or loose connection. sound. 5 Airbag light is on Failed to disconnect the battery while working on the vehicle. 6 System turns on only on radio source Aftermarket Power Antenna wire is connected to amp Remedy Insert or replace fuse Verify that Remote Turn-On wire is connected. Ensure that the low level RCA adapters are used in aftermarket headunit system (refer to the corresponding wiring diagram). Refer to the corresponding system diagram. Adjust level to reccommended setting (refer to the corresponding wiring diagram). Ensure that the PHASE is set to 0˚. Check all connections to the speaker, loose pins, disconnected terminals etc.. Disconnect the battery and re-connect after 5 minutes. If problem is not solved, the vehicle will have to be taken to a Ford dealer. Connect the Remote Turn-On wire (Blue/ White) to the Blue wire on the amplifier harness.