Are you confused to select Power Probe 3 Master Kit or Power Probe 4 Master Kit? Which one is perfect for your car short-open circuit test, ground feed, fuel injection test, audio test. ​Power probe 3 master kit is most popular and power probe 4 master kit has the latest technology. Which one you need? Power probe 3 is very reliable and power probe 4 is not much popular than 3 … [Read more...] about Best Power Probe Master Kit Reviews And Buying Guide