Battery parasitic drain test

Includes troubleshooting tips and advice for all levels of auto repair experience. To check parasitic draw you need an amper meter clamp. Shutting its power is not the same thing. After charging the battery overnight, the car starts fine.

But when left overnight without the charger, the car refuses to start.

Is your battery having trouble starting your engine?

There may be something draining the battery down.

A parasitic draw can cause the same result as leaving the headlights on-a dead battery. Many techs call key-off current the parasitic drain. Safety Precautions Before Testing. It is best to remove any jewelry and to wear insulated gloves and protective glasses to avoid shock or exposure to the battery.

Had dead battery issues tested to see if there was an ignition off draw that was excessive, I measured mA draw and the limit is mA. Battery evaluation is normally taken care of using automated devices or better still, the PicoDiagnostics battery test procedure where we test not only the battery , but the starting . To obtain the correct parasitic drain values it is essential to make sure that the vehicle battery is serviceable and fully charged with all accessories switched off. A component or components are drawing current from the battery when they should not be.

This test will show you how to quickly pinpoint the source of the draw using voltage drop across fuses. Buy online, pick up in-store in minutes. Finding electrical problems that drain the battery is getting harder all the time. 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 . In this example the battery was disconnecte this will reset the time and date on the dashboard!

You could also measure the current draw without disconnecti. So many of you have been asking about how to do small things like this which also includes tunin. FREE DELIVERY possible on eligible purchases. According to the EPA, the volt battery is the most recycled .