730 and Fan request drive circuit/

[Vinnie Moscaritolo]

I am trying to make setup my electric fan that I use in conjunction 
with the 730 ECU be a bit more controllable. I wish to turn on the 
fan relay by command.

I would seem that I could use the FAN REQUEST signal at D12, but this 
doesn't seem to activate the fan at all times.

Then I though about maybe grounding the COOLING FAN signal at E8 of 
the ECU,  but I am concerned the DELCO 16042368 which drives this 
signal...  does anyone know what the characteristics of this chip is? 
can you ground the output pins  without risking failure, or do I need 
to attach a couple of diodes?

anyone know?

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