These drawings explain only how the injectors are connected for each driver. The amount of connections will vary with engine size. (See specific drawings for your application.)

Batch & Split Sequential Wiring
With this method you always combine 2 drivers in series. This will lower the voltage to each of them simulating a current limit driver. In this drawing A1 is on cylinder 1 and A2 is on the cylinder that moves with it.

Batch & Split Sequential Wiring with dual injectors
With this method you still combine 2 injectors in series. The electronic relay will split the power from getting to the dual injectors. The ECU will switch the electronic relay on with a positive signal from one of the positive drivers reserved for this function. A diode large enough must be wired-in for each bank from the electronic relay. This will prevent power feedback from the injector drivers when the electronic relay is off. For low impedance injectors the diode must be 3A or higher.

Note: Make sure that the driver can take the combined current for the 4 injectors. Mercury2 can deliver 6 Amp per driver. In this drawing A1 & A2 is the primary injector and A3 & A4 is the dual injectors. A1 & A3 is on cylinder 1 and A2 & A4 is on the cylinder that moves with it.

Full Sequential Wiring
With this method only one injector is connected per driver. Then you need to install a ballast resister to reduce the current. In some cases, where the injector is on the large side, you may omit the resistor as the driver on the Mercury2 can handle the current and the fuel will cool the injector. Note: The resistors will produce heat, so it is advisable not to tape them in the harness. They may require air cooling on them.

Full Sequential Wiring with dual injectors
With this method you must install the ballast resistors. The electronic relay will split the power from getting into the dual injectors. The ECU will switch the electronic relay on with a positive signal from one of the positive drivers reserved for this function. A diode large enough must be wired in for each bank from the electronic relay. This will prevent power feedback from the injector drivers when the electronic relay is off. For low impedance injectors the diode must be 3A or higher. Some applications have enough drivers and then the dual drivers are connected as above onto its own driver. No electronic relay will be required. In this drawing A1 is the primary injector and A2 is the dual injectors.