Quick And Easy Test Light Conversion
For many years Automotive Technicians have used a test light with an incandescent globe for testing circuits and electrical fault finding such as to locate a defective fuse. You can check out the video below to see how to use a test light to find a bad fuse:
In recent decades, though, more up to date equipment must be used to protect delicate electronic circuits in modern vehicles.
A workmate of mine has always used the old style test light but realized the advantages of a LED test light and asked me if I could convert one of his old test lights.
After finding a base to locate the LED (I used a spare hose cap for this), I removed the globe and fed the wire through the side rather than the existing hole at the top. It is less inclined to get tangled this way.
I used a Bi-Colour Red/Green LED and a 330Ω resistor to suit. After about ½ hour the successful conversion was complete.
At only 20 cents AUD for components compared to $35 dollars AUD for a LED test light, I’d say that the conversion was well worth the effort and my workmate agreed.
Here is the schematic:
This article was prepared for you by Mark Rabone from Australia.
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