OTC 7645 Parasitic Draw Tester - Works on any Vehicle with Side or Top-Post Batteries

Find electrical problems that drain the battery
Digital amp meter takes the guesswork out of a complicated job
Attach the test switch between the negative battery cable and the battery and then road-test the vehicle
Connect an amp meter to the switch to determine the parasitic amperage draw
Works on any vehicle with side or top post batteries

Finding electrical problems that drain the battery is getting harder all the time. But using No. 7645 with your digital amp meter takes the guesswork out of a complicated job. Attach the test switch between the negative battery cable and the battery and then road-test the vehicle. Next connect an amp meter to the switch to determine the parasitic amperage draw and locate the excessive electrical drain on the battery. Works on any vehicle with side- or top-post batteries.