D2 coil pack 3 wires plug

[Ed Cheung]

The wiring to the D2’s coil pack is a 3 wires plug. The middle one is the 12v supply, but can someone explain to me what are the other 2 wires?
Thanks,
Ed

 

[eburrows]

The "Discovery Series II 2000MY Electrical Circuit Diagrams - 2nd Edition" page 20.4 shows them as wires going straight to the ECU. Probably trigger voltage for each of the two spark generators in each module.

 

[Ed Cheung]

Thanks.

 

[mlnnc]

Yeah, ground paths to the ECU for each of the two pairs in the wasted-spark system. Power in through the middle, with the ECU giving a path to ground to complete the circuit.