I was wondering where the main ground for ecu is on an 850 turbo? I was told there is one under passenger side headlight but i am not seeing anything when i take the light out. I had someone swap engine, now not getting spark and check engine light is not coming on with key, assuming ecu not getting power....?

 

31/33 in the diagram is the ground for the ecu. It's on the block behind/near the starter.

 

thanks for that....just took the manifold off and low and behold those are both unhooked.

 

well it starts now but shuts off right away, the fuel pump controller by top intercooler hose was coming apart....the plastic broke off. I need to know which wires go where? thinking this is the issue...

 

Looks like that's correct, but that's not the fuel pump relay - the fuel pump relay is 2/23, located under the fuse box cover - The fuel pump is 6/31

 

thanks for that, what else could it be shutting off immediately, no codes?

 

See my edit of previous post, and you won't get a "no fuel pressure" , or "no power to fuel pump" code. The system's not smart enough. What is the fuel pressure?

 

guess i can try swapping that out.

 

Or you could measure the voltage at the pump and check fuel pressure. Or with a short piece of wire with 2 male spade terminals attached jump terminals 1 and 3 in the relay socket to energize the pump all the time (just to test with)