Shran
Junk Collector
TRS Forum Moderator
Supporting Member
Article Contributor
Solid Axle Swap
Truck of Month
If you hook up your test light to an injector plug, you should get a flashing light as you crank the engine.
If you are getting nothing with the test light hooked up to only the injector plug, but then get a flashing light with it grounded to the frame, you have a grounding issue somewhere. IIRC the injectors are grounded through the ECM.
If you are getting nothing with the test light hooked up to only the injector plug, but then get a flashing light with it grounded to the frame, you have a grounding issue somewhere. IIRC the injectors are grounded through the ECM.