[RSBob]

Bet the fuse which blew is for the oxygen sensor too. Since all was fine prior to disconnecting the trunk light chances are good the source of your problem is that the hot lead to it is frayed or touching ground. I am no expert but would say you could temporarily run a higher amp fuse as long as you DO NOT RECONNECT the trunk light. I would first Investigate the trunk light wiring to determine the cause and repair. No warranties are expressed or implied by doing this. As the previous poster stated frying wires can be an extremely repair so use extreme caution. If in doubt of your skills, don't put in another fuse