Where is the fuel pump wire to the tank on a 91 Z. I completely eliminated the stock engine harness with the factory fuel pump relay on it and I just need to find the wire to the tank. I believe the relay was mounted on the driveside firewall but I dont think the wire went to the drivers side bulkhead, Im thinking it went to one of the connectors under the dash near where the pcm was. Can anyone verify that? Im pretty sure its a grey wire.

 

C100 pin G4 is power to the fuel pump
Connect your new relay output to this
Yes it is gray factory



The PCM controls relay engauge which is Dk Grn/Wht

LS1 PCM pin Red 9 is connected to this

 

Cant beleive I missed that, thanks alot for the help.

 

Do you know which wire would be the volt gauge on c100, Is it Brown, pin G8?

 

Correct, Im not sure why the coolant relay is also ran thru there as it goes directly to the gauge