As the car will be completly restored, I am considering to remove the entire harness, and create a new one, preferably with a under-hood fuse box in addition to the one in the cabin. Always preferable to to keep relays/fuses close to the heavy consumers.
In my head, the project setup would look something like this,
I've been looking at this setup, as it looks quite flexible. If anyone has experiance with other, similar setups, please let me know.
Waterproof Power Distribution Centers
I replaced all the fuses when I inspected the fuse box, as well as cleaned all the contact points. I also removed all the connectors and cleaned their contact surfaces.
I'll do the same with the relays - open them and clean the internal contact surfaces, but I've noticed that a few of them allow movement of the stationary contacts (pressing on the connectors pushes the contact point upwards inside the relay), which is not ideal.