why do my tail lights not work on my 1991 toyota pck up truck . I did recently replacs the ciggarette lighter
Your dash lights are probably out too. Check the fuse.
If the fuse is blown, replace and see if the new fuse blows, if so then probably something related in replacing the cig. lighter, if not then you may have just inadvertently touched the live wire to ground.
Search Toyota Pickup Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Toyota Pickup Experts