Turn on five power switches was a mission in Jak II. Jak needed Vin to switch on one of the access elevators in of the Palace's support towers. Vin, in turn, said Jak needed to turn on the old B-Zone Power Grid's power boxes, guarded by "motion-sensing turbo cannons".
Completion of this mission in the PlayStation 3, PlayStation Vita, and PlayStation 4 versions of Jak II will unlock the bronze trophy More Power to You.
Walkthrough[]
Yet another rat race through Haven City while being chased by the Krimzon Guard. While initially not hostile, the turbo cannons will shoot you as soon as you get into range (even if the alarm system is turned off). It is not recommended to approach them on foot, so either charge them with a two-seated or three-seated zoomer or use the Scatter Gun from close up while driving any of the stronger zoomers.
The cannons are marked on the mini-map; the first three are in the Industrial Section and the last two are in the Slums.
At this point, the KG will be chasing you. Therefore, you can't linger around for too long. As soon as you destroyed a turret, you will want to press the button below it and move on.