The petrol models have them . The triple left side control both the side aim headlamps via a signal and ties in to steering limits for the ABS and esp. Same for the low level triple power circuit on the right side. The centre is POWER earth and Live running a require boost of 14 volts all but via running power circuit only engine running that is. The left from the front is earth and right is live. They feed into capacitator that store whacks of high voltage to drive a high end winding that sits below in a ally dry case and above sealed in the oil is resovoir is the direct linked pump sunk in a bath of oil . The top and bottom are seperat and the weaknesss in these pumps is that the motor locks at the lowwer bearing from ingress of moisture .