Can anyone tell me which color is the positive on the fuel injectors. The constant wire is yellow/Black but I don't know if this is pos or neg.
Thanks!

 

Here you go.

 

Thank you Hi speed!!!!!!

 

FYI to anyone who is going to upgrade their injectors and change pigtails. There are two different color wires on the oem clip that you will have to cut and solder or splice. One wire is consant on every injector, it is Yellow with a Black stripe; this is the ground or negative. I hope this helps someone down the line.

 

I've been trying to find the negative side of a fuel injector for a rpm signal for a digital tps/rpm window switch to control nitrous for a week or two... I have the throttle position signal I just don't have the rpm one yet, so this definitely helped someone down the line, thank you..

 

It doesn’t matter which one is positive or negative. Just make sure each they all go the same way.

 

Thanks for the response TL builder, you're one of the people who's posts I've followed as far as reading and learning things looking for the info I needed on different things.. I didn't use the yellow with a black stripe I got the signal from coil # 6 on the nitrous express directions it said most efi vehicles you could get a tack signal from negative side of any fuel injector which confused me a bit had originally tried the wrong two wires on that coil I tried the middle (black) and the left (black with white stripe I think) so with no luck from those I started trying to find one from the ecu side...as I finally realized last night that it didn't matter like you said I went back to the only one I didn't try because I realized the colors on the diagram matched the ones I remember seeing on the coil pack wires and I knew it wouldn't matter which side I tapped into it from .. I think the wire is brown and white if I'm not mistaken it was on the far right if your looking straight at the coil #6 =] now I've got my controller ready I've just got to wire my relay and solenoids and the on off switch... I plan on posting some videos for anyone who cares to see when I've got it up and running.. thanks again

 

Thanks, Let us know how it goes Blake!