Injector wire which is Negative?

davec73

SCCoA Member
Does anyone know how to tell which is the negative injector wire? I need to run a wire for a shift light and the directions say to hook it up to a negative injector wire. Any help is greatly appreciated

David
 
The power wire for all the injectors is red. The other color on each is the ground. But the ECM uses the ground to fire the injectors, not sure how that works with a shift light??
 
The power wire for all the injectors is red. The other color on each is the ground. But the ECM uses the ground to fire the injectors, not sure how that works with a shift light??

Its an innovate mtx L boost shift light guage and that is what the manual tells you to do so you can go in and set the rpm and either make it a progressive shift light or solid. Thanks for the info man this is one of the last wiring things I had to figure out lol.

David
 
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