ZR-1 Net Registry Forums - View Single Post - No power to fuel pump, wiring help needed.

nherbst454 · 01-14-2018

Thanks for the diagram. I checked the relay and it seems to work when hooked to a battery. I also checked that the ground is functional which it is and I have continuity from the output pin on the relay all the way to the fuel pump connector so the wiring seems to be good. Even with the key on I believe that the control signal (verified continuity of the control wire from the wire to the ECM) is not being commanded on by the computer.

I tried to scan codes using the digital dash, all I'm getting right now is H41 when it first scans then nothing when it says 1.0 or 4.0 ( I just get dashes).

Any thoughts on what could be causing the computer to not turn on the fuel pump output?

I'm not sure if it's important but I've also noticed that the security light flashes when the door is open but goes away when I turn the key on. Not sure if this is normal or not.

Thanks for all your help, I'm looking forward to getting this beauty back on the road!

01-14-2018	#4
nherbst454 Join Date: Jan 2018 Location: Woodbury, MN Posts: 11	Re: No power to fuel pump, wiring help needed. Thanks for the diagram. I checked the relay and it seems to work when hooked to a battery. I also checked that the ground is functional which it is and I have continuity from the output pin on the relay all the way to the fuel pump connector so the wiring seems to be good. Even with the key on I believe that the control signal (verified continuity of the control wire from the wire to the ECM) is not being commanded on by the computer. I tried to scan codes using the digital dash, all I'm getting right now is H41 when it first scans then nothing when it says 1.0 or 4.0 ( I just get dashes). Any thoughts on what could be causing the computer to not turn on the fuel pump output? I'm not sure if it's important but I've also noticed that the security light flashes when the door is open but goes away when I turn the key on. Not sure if this is normal or not. Thanks for all your help, I'm looking forward to getting this beauty back on the road!