[ischmitz]

One (or both sensors bad) will cause no spark and no fuel pulses. However, the fuel pump is turning on as soon as the DME sees the starter signal. So if your observations that you have no spark and no fuel pump activity during cranking you either have both a bad sensor and a bad DME relay or something more fundamentally wrong with the DME.

Have you checked for fuel pulses. If only spark is missing it would indicate bad DME. If both fuel and spark signals are missing it points towards the sensors. And unfortunately you can’t “jump” them. The speed sensor is needed as its signal directly defines the fuel and spark pulses. The reference sensor is needed to correctly synchronize the signals to TDC.

I’d get replacement sensors and start from there.

Ingo