No Lights working in rear of car at all

As the title says, I have no lights working in either side indicators, or the entirety of both rear tail light  units. Both side indicators also don't work. They work up front though.  What could be up? I've replaced the ground cable in the trunk. I'm not very experienced with electronics yet, but I just rebuilt the motor so I'm not completely helpless.

I've also ran a test light on all the back lights, there seems to be no power going to them. Confirmed with a voltmeter. I read that fuse 6 is for lights, so I replaced that. I have a Haynes, but it doesn't go into depth for this. Thanks for any input guys!

So a yellow wiring harness wasnt connected to the fuse box... That explains it.

Glad you got there.

We probably wouldn't have suggested that tbh!

Welcome to the club btw. Hopefully the rest of your ownership is a little less, erm, traumatic!

Ian