Scarab 215 Medallion stereo not working

[FrankM]

My stereo system is not working. My touchscreen shows the Bluetooth connection but can't play a song. Radio also doesn't show any stations.

I found here answers that it's most likely a blown fuse. But where is this specific fuse? Behind the screen? Behind the glove box? Or on the back electrical panel?

 

[gRobi]

Have a look behind both for loose connections first.

 

[FrankM]

Ok, checked all the wires. Nothing loose. Found a fuse box (see picture). Checked them visually but they look fine. Need to come back with a voltmeter. Somebody knows which fuse is the correct one?

 

[FrankM]

Update: Radio is working again!
I traced every cable all the way back to the main switch. In the end I found a yellow cable which was not connected to the battery ?
It somehow slipped behind the battery and got overlooked ...
To prevent further issues I'm planning to install a bus bar for the negative pole. Too much yellow cables ... Need to consolidate into one!