A1: Im not sure what you mean!
if you mean to knock out lights and cameras without using bullets.
equip your pistol and point crosshairs at the item and press L1.
that will disable the light or camera for a few seconds.
if you use LEFT BUTTON ON D-PAD that gives you night vision and you can locate the cameras search pattern.
if you use UP BUTTON ON D-PAD that gives you electrical items.
if you use RIGHT BUTTON ON D-PAD that gives heat signatures.