This problem just happened a week ago. The turn signals and the reverse lights do not work. I disconnected the reverse wires from the safety switch and the turn wires from the connector on the streering column. The fuse still blows when the key is turned on. I have tested the wires for a ground fault, all OK. The brake lights and 4-way flashers still work after the fuse is blown (different fuses, same wires). The car has not been rewired (to my knowledge, the previous owner let it sit for 5-6 years, I've owned it since 2002 and it only has 64k on it). I pulled all the fuses and only had this one in and it still blew. I am thinking that there is something else on the circuit that is not documented in the owner's manual (SFE-20 - Turn, Backup, Cruise). There is nothing special about this car, it is a regular Cutlass 'S' Sports Coupe. I need to buy some sort of manual that can help me with problems, say a Chassis or Service manual. I have a Chilton, but it is no help with wiring. Any suggestion.