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hello and welcome to this video on Pico Diagnostics this particular video is going to look at how to carry out a very quick and simple compression test using our picoscope and the pico diagnostic software now before we take a look how to connect up our hardware and how to run through the software itself what's important to note this stage is that with this compression test like all other forms of compression testing we must ensure that the engine is not able to start now on most modern systems this can be quite easily achieved just by simply removing either the injector fuse or the fuel pump relay now in terms of connecting up our hardware for the test all the software needs is a very quick and simple connection to the vehicle battery and if you look at the video in the bottom right hand corner you can see that already have my test fleet connected and then it's connected to battery posi