No-Start background:
1) Car not running when acquired, bad harness replaced it,car wouldn't start
2) Ignition works (fires on starting fluid)
3) Pumps run when missing ECU groundis hard-wired to the Fuel Relay 86/2
4) Injectors get Voltage from Fuel Relay, butdo not operate under ECU control
5) Current assumption is that the ICU pin 8 signal is not getting to
ECU pin 1, as needed for ECU Fuel Relay ground and RPM signal for ECU
Injector grounding

Questions:

1) Does anyone know the physical ICU-to-ECU path or routing for this
signal?
2) Are there any intermediate connectors between ICU and ECU? If so,
where?
3) Can a DVM, be used to back-probe ICU pin 8 for a pulse when cranking?
What voltage scale? What to look for?

4) Any precautions about the ICU connector (removal)?

I am greatful for any assistance that I receive from the Volvo Gods, Dave-ed