Same idea really, just that you have to bother disconnecting something and try one by one vs just measuring it fuse by fuse. Other method is getting DC clamp m

Same idea really, just that you have to bother disconnecting something and try one by one vs just measuring it fuse by fuse. Other method is getting DC clamp meter with low range (say 2A). Then just clamp in on wires. Bit fiddly as they work on magnetic field so they need to be reset before measure (And can work as compass in a pinch...)