the purple is connected to your indicators requiring two diodes so it will make the indicators flash when you lock or unlock the car... you dont need to connect this if you are hookin it upto the alarm. the white and the brown one goes to a alarm system and uses a negitive trigger to activate your keyless entry system.

the bit your are doin wrong is that the mater (drivers door) needs all wires connected to work as this tells the other doors what state(unlocked or locked) they should be in


wait people have already answered #OOPS# i should read before typing

hi i have nissan pulsar 1998 sedan. its got central locking. but i tried to install keyless entry. remote just open the locking. but i cant lock the car by remote. central locking working well. if i use testlight. clip to ground and tried all wires from central locking unit. it just unlock the car. i m stuck here now. dont know what to do. any help will be thankful.