Chrysler laser 1990 Technical Information Manual page 147

INJECTOR CIRCUIT
,
Electricity from the battery flows to the control relay
and then to the resistor (turbocharger-equipped
models only), the injector, and the engine control
unit.
Upon reception of the fuel injection signal, the
Control relay
No.
Engine control unit
engine control unit causes the power transistor to
be turned ON, thus completing the injector ground
circuit. In this situation, current flows to the injector,
which injects fuel while the power transistor is ON.
Resistor <Turbo>
Injector