Lisle 64970 Parasitic Drain Tester, One Size, Factory

This tool is an excellent piece to help locate a parasitic drain.

A must for troubleshooting electrical faults in anything that has an automotive, truck, power equipment with DC battery

Highly recommend this battery adaptor cord for trying to find those pesky parasitic drain problems. Has a mini fuse on both positive & negative cords.

I have not tested this on a 12v battery for I am not sure the directions are correct. I did run power from a 9 volt battery and tested it with my multimeter while using specified directions which means turning the switch 📴 for using your meter. I could not measure any voltage, but turn the switch on and the 9volts is measured. It would seem more accurate to turn the switch off when you place your leads in the lead holders then turn the switch on for the current to flow and then read the current draw of course allowing time for any awakened power to sleep leaving only the culprit parisitic draw to show his hand. I welcome your comments which I am sure would be helpful. My theory is disconnect neg terminal and connect the drain tester to battery neg terminal and battery neg lead cable with the drain tester off then plug in your leads from your multimeter turn on your drain tester wait a few minutes turn on your multimeter then read the meter results for a few minutes. If there is a parisitic draw one would have to remove the meters leads and test each fuse to trace the draw to it's source. The reason I have not used this is I replaced my battery which was defective. I am keeping my lisle tester for I believe it a great product. I hope this helps someone.

Works like a

Works great, have used several times to find loads. Very accurate, easy to use.

A commercially made harness made by Lisle that is so simple but takes the place of the home made 10 watt resister with alligator clips soldered on each end then having to put alligator clips on your test leads then hook it up with one on one side of the resister and the other on the other side, with so many connections made it would fairly easy to miss a current draw of 50 Ma, never mind what the heck is causing it. Disconnect the negative battery terminal, connecting this tester in series to the regular battery cable.This tester is fused, it has an on/off switch, and it has two pass through banana plugs that connect directly into the fused current inputs on your multimeter. This is a necessity for newer cars to detect draws that are so slight that the test light trick will not work here. All of the connections are extremely dependable and the fear of missing the problem due to a bad connection is minimized. Lisle 64970 Parasitic Drain Tester This is one diagnostic tool that I didn't have to think about, as soon as i realized what it was I put it right in my shopping cart.

I read some reviews that said this was wired incorrectly, but I didn't believe them. Turns out, it must be a common problem for these to be wired wrong. The fuse blew immediately upon attaching to the battery. After testing the harness, I discovered no resistance between the two battery clips. There should not be conductivity between these two ends.