I used one like #3 20 years ago to test for draw. At that time some devices needed up to 20 minutes with power to properly shut down modules. With that type of device you could set up an ammeter in series using the device and after 20 minutes or so safely disconnect the battery to check for draw. With all the new electronics on cars today I wouldn't even want try to figure out what would be a normal draw. It used to be
These don't really last. They pit on the contact area after awhile and you'll come out one day and nothing. So you reset it and it's fine. It'll do that for a bit then it will start to barely connect. Check alternator starter and battery all seem good so your thinking it's a parasitic draw somewhere. Nope it's that switch.
I used one like #3 20 years ago to test for draw. At that time some devices needed up to 20 minutes with power to properly shut down modules. With that type of device you could set up an ammeter in series using the device and after 20 minutes or so safely disconnect the battery to check for draw. With all the new electronics on cars today I wouldn't even want try to figure out what would be a normal draw. It used to be
When you cut off your battery, all life on Earth stops in its tracks. 😮😅
These don't really last. They pit on the contact area after awhile and you'll come out one day and nothing. So you reset it and it's fine. It'll do that for a bit then it will start to barely connect. Check alternator starter and battery all seem good so your thinking it's a parasitic draw somewhere. Nope it's that switch.