StefanA

Okay, some more troubleshooting done!

Came back to the car, saw the alarm light flicker but no reaction when I tried to open the car by remote - although I did lock it by key yesterday. Opened by key and the alarm started blaring. Pressed the unlock on the remote holding it just in front of the dash to no good. Solution: opened the bonnet and yanked the connections to the horns...

Tried start, no. Tried to jump start by towing, no. But I suspect that the immobilizer is stopping everything since the alarm went off and I couldn't shut it off properly. Had the battery disconnected for half an hour but no change.

The alarm is as far as electrics go now, no reaction at all when turning the key, no hazards, no headlights - nothing. Checked the fuses under the bonnet and under the dash and all seems good. Got a tip about the 60A fuse between the Ecu and expansion tank and that sure looks funny. Looks somewhat melted but I beeped it with a multimeter and seems fine, though the connections looks a bit corroded. A culprit maybe?

Anyway, I got it towed back to my garage, so now it's indoors with my tools. Makes it easier to work.

So, replace the 60A or should I suspect some relay instead?