Ok thanks very much for the help guys, I have another request if anyone could help.

Does anyone have a picture or a drawing of the layout of the fusebox and relay/circuit breaker box? The names of what the fuses and relays and breakers have all faded as have the ratings so I do not know what fuses to put where. XD falcon by the way

take each fuse out one by one, and then try to switch the lights on.
it can be a bit hard with the glass fuses though.

Ok fuses all replaced and everything all good but before I go driving at night again, should I replace the circuit breaker with another 25A one or a higher, say 35A circuit breaker?

just out of curiousity, what wattage are the headlight bulbs you're running?

dont go replacing the circuit breaker with one rated higher than standard because if there is an actual issue, you stand a chance of melting the wiring and setting your car on fire

best solution is to get your headlights rewired with a new loom for the headlights, using the existing wiring as far as where the battery is to control a pair of relays (high and low beam) but avoid driving at night for the meantime