Evening fellas


looking for a bit of advice please.

my 1992 sapphire azuras alarm keeps going off every 40seconds to 1min after arming.

I've checked all doors/bonnet/tailgate switches are attached and moving freely and all is ok.

however when opening doors/bonnet/tailgate after being armed it's not setting the alarm off then when the 40/1 min is up the alarm triggers?

any help would be appreciated as I would like to fix this myself😬

Cheers 👍🏻👍🏻👍🏻