1996 Ford F-250 problems

I have a 96 F250 7.3 I have a wire under the steering collum That is unplugged not sure what that is, need help idifying the wire, also don’t have taillight! Checked the fuses but no taillights help!!

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0