I was reading up on injectors on the ecu plug in the FSM and was wondering.
Does REAR PRIMARY and REAR SECONDARY mean back rotor injectors and does FRONT PRIMARY and FRONT SECONDARY mean front rotor injectors??

 

an another thing, is the one harness for secondary and one for primary or do they take one plug from each harness?

 

There is one emissions harness (ECU harness). It contains the connectors for all 4 injectors.

There is a primary and secondary injector for each rotor. The front primary is literally the primary injector of the rotor closest to the front of the car. The rear primary is the primary injector in the rear most rotor. And the same for the secondaries.