For anyone following along on
"The Weird World of Parasitic Draw" covered here...
THIS is Important:
Performing a
Ground Side Voltage Drop Test is a BASIC and VERY CRITICAL STEP in isolating otherwise Invisible Problems on Circuits where
HIDDEN RESISTANCE is present in the Wiring and the need to discover any
UNWANTED LOADS that will create mischief on Automotive Electrical Circuits.
I searched around for the Best Video Training Exemplar I could find that balances...
(1) Basic Electrical Theory (White Board Diagrams)
(2) The Unusual Use of a Diagnostic Tool (DMM)
(3) Visual Models of Loaded Electrical Circuits
...All meant to clear away any misconceptions about what happens when a
Ground Side Circuit shows B+ Electrical Flow and what to do to solve this problem during your Troubleshooting Diagnostics
THIS Video meets all of those requirements and deserves a special place next to
@Realism 's Classic Thread linked below regarding the
Ground Locations in the GMT360 SUVs.:
While troubleshooting a bad ground I came across some scans of the service manual regarding electrical ground locations for our platform posted on another site. This includes both short and long wheel base, as well as both 4.2L and 5.3L. Credit goes to Wex...
gmtnation.com
THIS Training Video and "Screen Prints" are KEEPERS!
And here, Paul "Scanner" Danner and his son, Caleb work on diagnosing his Younger Step-Brother's Vehicle suffering with a Battery that has a
Died from a Parasitic Drain using his redoubtable Snap-On Vantage MT2400 Graphing Meter: