3rd party alarm/ central locking

[Custard Kid]

after me shorting out the ign fuse 20A and van ignition wouldnt turn, i went out about checking all fuses by removing them all and doing a visual and continuity test.
my alarm fob (3rd party i think its lazer) doesnt unlock the rear doors nor sliding door on button 2 which has always been the case. button 1 still locks and unlocks the front doors.
if i unlock the rear door with key and then press button 1 to unlock and lock front doors and rear locks itself.

could the alarm forget that button 2 function?
i dont have the oem fob but will be sorting a pair out.

[Custard Kid]

fixed well kinda

the alarm will not remote unlock rear doors so i ordered a remote fob and programmed it and works so looks like alarm is getting shot

[Custard Kid]

fixed well kinda

the alarm will not remote unlock rear doors so i ordered a remote fob and programmed it and works so looks like alarm is getting shot