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04-14-2017 #1
LS2 Fuel Pump Wire Not Energizing?
I purchased a harness from Current Performance few years back. I have a 2005 LS2 from a GTO.
I'm having a problem with the fuel pump signal wire not energizing. I believe the problem is either with the fuel pump relay at the fuse box or at the ecu connection. I was hoping to get some help diagnosing.
The fuel pump relay at the fuse box has a red power wire that is hot under cranking and when the key is in the accessory position. There is a black wire that appears to be constant ground. There are two other wires, green/white and a gray wire. Neither have power under cranking or accessory position.
I was hoping for some operational understanding. I believe the green/white wire goes to the ecu which is signal (blue ecu connector #45)? And the gray wire is the fuel pump wire that brings power to the pump?
If the gray nor green/white wire ever receive power I'm thinking the ecu is either not sending signal through the green/white wire to the relay or the relay is bad? I tried swapping the relay with the identical ignition power relay but nothing changes.
Any help would be greatly appreciated.
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04-14-2017 #2
So I jumped the red wire to the green wire and the fuel pump kicked on. I did the same to the gray wire and the fuel pump kicked on.
So now I need to figure out why the power is not being sent through the green wire from the ecm when the accessory power is keyed?
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04-14-2017 #3