Join Date: Apr 2010
Ferrari Life Posts: 2,206
First try swapping relay N in the illustration below with relay Q and see if it helps with any of the dead circuits.
Relay N controls all the key operated circuits. If it fails, it will knock out many things.
Relay Q is supposed to control the low beam headlights.
Along with the other things you mentioned, relay N is supposed to control the starter, injectors, and ignition as well, so if your car is still starting and running OK, the problem may not be this relay, but it's quick, easy & free to try, before you have to dig deeper for more expensive and difficult solutions.
'99 550, Rosso Corsa / Nero, S/N:114654, Assy: 31836, Engine: 52084
High mileage, low compression, and missing on a few cylinders.....just like my cars.
Maranello Skunkworks Team Member