Sorry, this is kinda long, but here goes.....
To Test for Parasitic Battery DrainTo test for the overall system voltage draw on a battery:
With the key off, all doors shut and locked using remote, and then waiting for at least 1 hour or more to allow for all modules to time out (go to sleep).
TEST A• Connect a multimeter set to
milliamps between the negative battery post and the negative battery cable, then being careful, disconnect the negative battery cable while keeping the leads connected. or in your case use the quick disconnect.
• You can also use an AMP Clamp Meter to Measure Parasitic Battery Drain in place of a multimeter. Simply clamp it around the main negative battery cable with it set to milliamps.
NOTE: If using a multimeter, it is important to maintain the connection through the multimeter when you disconnect the battery cable so you don't have to go through the wait period again to allow all the modules to time out (go to sleep). If you simply disconnect the battery cable and then connect the multimeters' leads from the battery cable to the battery post, you will have to wait and allow all the modules to time out (go to sleep) to prevent any false readings. This test will provide you with the
overall system drain/voltage which should be 0.045 amps (45 milliamps) or less which is generally considered acceptable for a vehicle’s battery when the vehicle is at rest and all modules have timed out (went to sleep).
Now, if your system drain voltage is >45 milliamps, it is time to test each individual fuse to determine which circuit is causing the unwanted drain on the battery.
• With one multimeter still set to milliamps connected between the negative battery cable and negative battery post.
(A 12v test light can be used in place of the multimeter for this test if you only have one multimeter available.) A 12v light connected between the battery cable & battery post while they are disconnected will indicate a battery drain by being illuminated; the brighter the bulb burns, the greater the battery drain. This method will just not tell you the total amount of the drain which you really need to know. TEST B• To perform this test, it is best to use a second multimeter set to
millivolts and read the voltage draw across each individual fuse until you find the one(s) with the highest volt reading.
(Could be more than one)• Start with the fuses in the TIPM (Power Distribution Center) under the hood, and then move to the fuse panel on the left side of the dash
• Once you have found the suspect fuse or fuses with the highest voltage reading, remove the fuses one at a time while at the same time observing the milliamp reading on the multimeter that is connected between the battery post and cable. When the fuse is removed (pulled), the milliamp reading should drop. If it drops to <45 milliamps or less, you have found your main parasitic drain. (Be aware, in some cases, it may be more than one fuse {circuit} causing the unwanted drain on the battery.
This is why it is very important to watch the total drain on the system at the battery when removing each suspect fuse.There are plenty of YouTube Videos if you search which shows how to check for parasitic drain on a vehicle's battery.
Here are a couple samples:
https://www.youtube.com/watch?v=lRcj1fQ ... leMechanichttps://www.youtube.com/watch?v=jnQ3qCY ... 7sAnalysis
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