You will find 2-off fuses for the alarm module located in the rear fuse box. The alarm module is located in the trunk behind the rh panel, it is a white box with one plug. Remove the plug and remove the module. It is possible to take the cover off the module in which you will find a circuit board with 2 black relays, one operates the door locks and the other the alarm. The relays do tend to stick so try spraying them with some switch cleaner. If the circuit is burned out you will probably have to replace.