A couple of days ago I was driving behind my dads Disco 3 57 plate when I noticed that the top middle brake light was working fine however the left and right side weren't. Just to be safe we put a new brake light switch in but that has solved nothing. All the fuses next to the battery are fine and all the bulbs are in tact.

What the heck could be the issue??

He did get the "suspension faulty, normal ride height only" fault the other day but that went away after turning it off and on again.

Any help would be appreciated.

Thanks