Okay guys I installed a Boss double din about a year & a half ago by myself grabbed the harness & I guess a harness to connect to security system in order for it to actually cut on... I wired it up & put black tape on wires because I planned on upgrading later on. I noticed sometimes when I cut the car on the double din doesn’t cut on, I would have to turn car off & switch to on a couple times for it to cut on... I looked for answers & didn’t get anything so figured it was the double din or the ground not being properly sealed. Fast forward to beginning of this year I got a pioneer with Apple CarPlay & this time I heat shrink the wires & it still does it... anybody knows what it could be?