probe, they're supposed to be able to trace a short down the correct path. I've never had a need for it since I bought it so I dont know how well it works. Has anyone had any experience using one? Hi I've used a current probe a number of years ago and found it worked OK for trace short, when they were accessable on the surface. I've since found a method that works fine for me, using standard bench top items. You need a 4 or 5 voltmeter that has at least a 200 uV range and a current limiting power supply. What you do is to place about a 1 amp current from end to end of the curcuit that is shorted to another curcuit. Do not place the 1 amp through the short. This will generally create a 20-100 uV drop across the curcuit. Now, clip one lead of the meter on the other curcuit ( the one that this curcuit is shorted to ). With the remaining lead, trace along the curcuit with the current flowing through it. When you get to the point where the short is, the voltage will be zero. On either side, the voltage will be plus or minus, telling you which way to go. Check the meter regularly for offset by connecting both meter leads together. This will help you especially when you get close. For curcuits with branches, you may need to move where you put your end to end current to follow another branch. This method also works for power planes. Say there is a bypass cap that is shorted someplace. Place the current source on opposite corners of the board and trace until you have a line ( usually curved ) across the board that measure zero ( I usually tape a piece of string along this line ). Move the current source to the other corners. Again, find the line. Where the lines cross, you'll find the short. There are variations of this method that I've used to find multiple shorts. Dwight