Pretty much all the bigger cars these days still use electricity even when the keys off and the car locked.
The Jag I've just done takes more than 10 mins before the vehicle goes to "sleep".
A test for parasitic draw involves an amp meter connected between the disconnected battery negative terminal and the - clamp to read just how much current is being used when the electrics are supposed to be off.
Posted on Saturday 15th of October 2016Don't understand this? Ask a question