Undocumented Discovery 3 fuses actually affect your stock stereo

[JPERL]

I recently discovered that there are 3 fuses that if any single one is blown the radio will not work

Fuses #3,5 and 7 per owners manual all 7.5A

Dome light, digital clock, door open Fuse-Radio Turns on but there will be no sound
Cigarette Lighter Turns on but there will be no sound
Fuse for Radio if blown radio will not power up at all.

Looking at the wiring diagram still revealed no clues as to why this is

[Megadysart]

I have my dome light fuse pulled because the driver's side door ajar switch is broken so the lights stay on. My radio works fine.

[JPERL]

I have my dome light fuse pulled because the driver's side door ajar switch is broken so the lights stay on. My radio works fine.

But is it a stock Toyota Stereo. Aftermarket would not be affected by this

[Sir Goofy]

I remember reading in the manual about an anti theft system built into some of the radios.