Wel as far as I know Fuse F5 is for the backup tension (12V permanent.).
I use it for the remote door opener backup radio clock alarm.
On the fusepanel it is fuse F5
It also give the blinkers tension.
![](https://lh5.googleusercontent.com/-1PI6hE-JCKY/T-DyfiMqvVI/AAAAAAAAD4I/t0Fo24b3kZc/s800/Fusepanel.jpg)
The electronic stuff like alarms and backup radio and clock don't ask much current.
Only automatic deuropeners us e a bit for the moment it opens.
The blinkers all around use 2x21W + 2x5W if alarm lights are on, wich is 4.5 Amp
Fuse F5 = 16 Amp, so not much problems to expect if you put some stuff on it
Maybe that anwers a part of the questions