Great Tip To Help With Battery Draw Test

In this video I'll show you a great way to make your battery draw test, aka parasitic draw test, more accurate and easy. It involves using a knife blade switch at the negative battery clamp and having an ammeter hooked up to it so that the current is diverted through the ammeter when the knife blade switch is disconnected. Using the knife blade switch this way is beneficial in two ways. First, it makes it possible to divert the current flow through the ammeter without stopping or interrupting the current flow to the battery. This is important as things tend to "wake up" when power is disconnected and reconnected to them and using a knife blade switch in this manner will prevent that from happening. By not waking up modules or components this way it helps to insure that the draw you are seeing is the actual draw that is causing the battery to die and also helps in keeping you from chasing a module or component that aren't actually the cause of your battery draw. Second, it frees your hands up. You can simply place your ammeter in a place that is visible while you isolate your fault while monitoring current draw.

Note: This video is not a "how to" video for performing a battery draw test. This is just a tip that may help assist you to perform a more accurate test. Please see your repair manual for step by step instructions for performing a battery draw test.

Here are some links to different battery disconnect tools. The first one is similar to the one in the video.
https://www.amazon.com/Ampper-Disconnect-Isolator-Negative-Vertical/dp/B07JZ9NDH2/ref=redir_mobile_desktop?ie=UTF8&aaxitk=yNzLZvNigSo-qoexT0BatQ&hsa_cr_id=3015601430901&ref_=sbx_be_s_sparkle_td_asin_1

https://www.amazon.com/Ampper-Battery-Disconnect-Switch-Isolator/dp/B07JYYXJH7/ref=redir_mobile_desktop?ie=UTF8&aaxitk=loUIHPpLh4xGDGkVufAwyQ&hsa_cr_id=3015601430901&ref_=sbx_be_s_sparkle_td_asin_2

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Repair your vehicle at your own risk! Barbour's auto help does not guarantee a proper repair using these techniques.