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".
The PlayStation 3 and Vita versions of this mission are related to a trophy named "More Power to You", completing this mission will reward you with a bronze trophy.
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 and with the KG chasing you you can't linger around for too long, so as soon as you destroyed a turret you will want to press the button below it and move on. The first three are in the Industrial Section with the last two in the Slums.