I have a 93 SL2 -
On J1 of the PCU (ECU) pins 16-13 D you can use any of those. If you look at the wires in the engine bay you each injector has a pink/black wire - that is not the wire you want..
So, the 4 injector wires 16-13 on J1 of the PCU (ECU) you can tap into any of them.
I did disconnect all the injectors and measure with a DMM.
For the VSS you want to use Speed out On J2 of the PCU (ECU).
For power and ground I tapped into my cig. lighter.
Let me know if you have any other questions, our hookups should be the same.
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