Hey all,

I'm installing an 87 iroc body and TPI engine harness in a 91 Z28.

everything seems to be working except I get no power to pin D of the c207 connector for the fuel pump. On the body harness side of the connector is a brown 10 gauge wire and on the engine harness side of the connector is a 10 gauge Tan/why wire.

This wire Powers the fuel pump relay while ECM I believe switches the relay on but without power that relay does nothing.so I get no pump prime.

I'm having a hard time tracing the pin D brown wire back to its source of power. Any help would be appreciated. I think it goes to the injector to fuse at the Box supposedly but I can't seem to find continuity between that wire and the fuse box.

This could just be a misconnected wiring harness or something like that but I am at a loss presently.

I should be able to figure it out when I get the service manual books on Friday but in the hope of figuring out sooner I thought I'd reach out to the hive mind here at TGO.

Thanks.

 

I think the power for the fuel pump relay is the red wire by the battery protected by a 20 amp fuse.
The splice also feeds the ops.

 

You were spot on Tuned Performance! Turns out I never hooked that circuit to power, so the entire engine was without power. Thanks!

 

Glad you got it, hope you get the valvetrain figured out soon.

 

Aye. Just need to wait on a shop to have time for the valve train.

 

n/m