Review on GODIAG GT101 Power Circuit Probe Tester Kit, Automotive Electrical System Test Tool for 6V - 40V DC Short Finder, Relay Fuse Tester, Diode Resistance Check - Ideal for Cars, Trucks, and Motorcycles by Matt Louis

Has the ability to monitor voltage, test ground or current, test relays and power wires long enough to allow you to reach the back of your car when installing a new 7 pin trailer pack. This is a great tool to have on hand. As with any injector cleaning, I would never use this feature, or at least don't intend to use this feature at the moment. It would be nice if I had an actual storage box instead of a cardboard box, so I have to buy a small plastic tool box to put it in as I don't have to tightly coil the cord to return it to the box after each use. Will be testing the 4WD solenoids on my F150 tomorrow, making sure it is receiving power as well as the switch control area, bought a used Ford and the 4x4 is not working after replacing the GEM module they claimed it was works badly. bad GEM or other problems that will tell me.