2001 Volvo S80 Brake Lights

your problem will be a bad relay in the Rear Electronic Module located in the trunk on the left hand side behinde the cover. Do not know for sure if your owners manuel wil show you that or not for the location of the relay. If it does not let me know and I will try and get you the location. If you dont have your owners manuel go to this

https://www.2carpros.com/articles/mitchell1eautorepair-car-repair-manuals

Hi, and thank you for your reply I am looking at the owners manual at the moment it shows exactly where the fuse box in the cargo compartment is where I already have looked at the related fuse which is perfectly fine! Unless you are tallking about the the main fuse box (big black fuses) which is located in the same area directly next the fuse box and which the instruction manual strictly advises not to be changed except by and authoraised person and therefore the owners' manual does not say which black fuse does what. I would be very grateful if you could let me know where that bad relay is and I shall declare my self an authoried owner for one day and change it myself! I have already had a couple of so called authorised pepole look at the problem and all I got from both of them is no electricity is reaching those lights (as if I already did not know that) one of them even made me buy a brand new brake light switch. Thank you again for your help and I look forward to your next reply.

email me joker_bhd@yahoo.com and I will give you my contact information and guid you through. The relay is located inside the rear trunk area left hand side behinde the panel. You will see the module in the back with fuses and relays.