Tutorial: The BEST Procedures for Performing a Parasitic Draw Test

MRRSM

Lifetime VIP Supporter
If you keep suffering from the "Dreaded Dead Battery" problem at the most inconvenient of times...which means ALWAYS... THIS Video has laid out the very best procedures and links to related Fuse-Type vs, Voltage Drops vs. Amperage Loss Tables and the Best means to seek and find any Parasitic Current Problems. The Basic equipment he uses is common and in this method... having an ultra sensitive Ammeter will not be necessary if you perform the requisite conversions that come out of your investigative findings correctly. The appearance of the VOP in this Video might "Look a Little Haywire"...but the manner, techniques and information he imparts here... are NOT. Well Worth Downloading into your Mechanics' Video Library :

 
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MRRSM

MRRSM

Lifetime VIP Supporter
As mentioned by "The Humble Mechanic" ... Here is a Link to those Power Probe Voltage to Current Draw Conversion Charts that cover a wide range and type of Fuses. These can be Downloaded for print outs for eventual Test use:

https://www.powerprobe.com/fuse-voltage-drop-charts/
 
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MRRSM

MRRSM

Lifetime VIP Supporter
Courtesy Eric "O" over at South Main Auto Shop... I just located a Youtube Video Specific to our GMT360 Trailblazer & Envoy Platform concerning Diagnosing Parasitic Draw that might help cut to the chase on the Diagnosis. Strangely enough... THIS Part (1) of a Two Part Video is HIM asking for HELP from others with more experience with this problem... (DAMN You... Trailblazer...!):


And in his Follow Up Video... The Parasitic Draw Problem turned out to be a BAD (SHORT CIRCUITED) INSTRUMENT PANEL CLUSTER.

.... and Listen to the Telephone Conversation Eric "O" had with the Service Technician who re-built the Instrument Panel Cluster as being directly caused by "Silver Migration due to the OEM Manufacturer's use of Lead Free Solder...." This Silver Migration Shorts Out the IPC and THIS is the Cause and Origin of having a Dead Battery brought down by a Steady .25 Amperage Draw... Who Knew... Right?:


...and also from The Redoubtable "Eric The Car Guy"...a Very NIce additional Tutorial Video:

 
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