Asnolan59 Posted April 5, 2020 Report Share Posted April 5, 2020 Installed an amplifier in a 2019 f150 non-Sony system. Sounds great with ignition at on position. Start truck and volume drops, but volume number on head unit stays the same. Turn ignition of for a few minutes, the back on. Volume comes back until you start truck... help please Link to comment Share on other sites More sharing options...
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