How to make an injector test light?

Whether it is quickly checking an injector harness, sensor or solenoid valve of some kind, you may need to check whether the delivery harness is either supplying power or a signal. A very quick way to determine this is by using a test light or sometime referred to as a noid test light.

However you can easily make you own with a 12v light, a small amount of wiring, safety pins and some crocodile clips.
An easy fix to perform a simple test without the need to necessarily buy purpose test lights for your vehicle…

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