Peugeot 405 1993 diesel estate

the alarm control unit is fitted under the drivers seat can be accessed from the rear foot well by putting seat fully forward .unscrew the two nuts holding the cover the relays are inside the unit.

this unit interfaces will tell the fuel stop solenoid to release (by applying 12 volts)

the fuel stop solinoid is on the main diesel pump under the bonnet - the exac location on the pump will depend on the make - but it should be cylindrical and have one wire connected to it - (i dont think peugeot were using multi wired coded soleniods in 93)

obivously if your car has the keypad immobilser you will know where this is - if it is the remote alarm immobilser the reciever is in the over head consol near the interior front light