In total there are 19 tesla towers scattered around the three main islands and your objective is to shut them all down. Tesla towers ar represented on the map by a symbol showing the top of the tower, roughly a sphere on a pole with a ring underneath the sphere. Once a tesla tower has been deactivated the symbol will be overlaid with a green tick.
To deactivate each of the tesla towers requires a unique 6 digit code which you will be written in the jornal entries which can be found near the deactivation code input in the base of every tower. The tesla towers can be deactivated in any order regardless if it is emanating electricity or not.
Below are the codes for each of the tesla towers and the island they can be found.
Bottom Island Tesla Towers
846264
950288
979323
265358
314159
338327
Right Island Tesla Towers
097494
419716
459230
510582
781640
939937
Left Island Tesla Towers
214808
534211
628620
706798
803482
899862
Central Island Tesla Towers
161803