How To Read & Interpret Automotive Schematics

[mrrsm]

More so than most GMT360 Specific Sites available to us on the Internet… GMT Nation has an array of “SME” (Subject Matter Experts) who, for purposes of this Thread, you well know as @budwich , @TJBaker57 and a few others that are also considered as 'Diagnostic Sleuths'.

These are the Folks that have "The Chops" to often cut through the 'electrical clutter', correctly pinpointing certain problems and solution ideas for guiding Members, Visitors (and Lurkers) through the maize of “The Mystery of Electricity”. Still, it occurs that THIS is one area we will ALL need a little help with, from time to time:

How To Read & Interpret Automotive Schematics for Diagnostics - Solutions.

THIS 'Dude from The YouTube' comes to the Rescue here with a whole series of YouTube “Auto Schematic Talky-Touchies” , putting our noses right down on top of a variety of Automotive Schematics while explaining each Circuit and Connection in exquisite detail. And so this is yet another series of Training Videos worth Downloading, Saving and Referring to from your 'Mechanic’s Media Library'.

Bear in mind that the important aspects being described apply to ALL Vehicles from the standpoint of using the same Definitions and Schematic Layouts that are Universal in the Automotive Industry:

SO PLEASE... DON’T GET HUNG UP ON THE VEHICLE MAKES & MODELS

HOW TO CHECK FUSES FOR SHORTS FROM WIRING DIAGRAM:​

BCM: BODY CONTROL MODULE COMPUTER CONTROLS STEERING WHEEL ACC:​

BCM: HOW DIAGNOSE BCM INNER WORKING FOR LIGHTING SYSTEMS:​

NO CRANK NO START DIAGNOSIS: HOW TO TROUBLESHOOT:

FUEL PUMP: RELAY PROBLEMS, ,WIRING DIAGRAMS AND USING A DMM:​

RADIATOR: DIAGNOSING OVERHEATING CONDITIONS:

https://www.youtube.com/watch?v=xoLtYBR32B0

FUEL INJECTION: PICTORIAL DIAGNOSTICS FOR THE NOVICE:

https://www.youtube.com/watch?v=JfjG8EfP2hM

More to Follow...

 

[mrrsm]

Even when diagnosing an Older Legacy GM Truck for DRL Issues... Following along on Will Robinson's Diagnostic Step By Steps will allow the Average Mechanic (and the Experienced Ones) with "How To Read And Interpret Automotive Wiring Diagrams" and follow defined diagnostic Orders of Operation that allow these Modules to either Function... Or FAIL.

These are all Well Worth Downloading and Saving to your Mechanic's Multi-Media Library to visit often and play at 1/2 Speed via VLC to be easier to digest and absorb this important Training:

Part 1:

Part 2:

And finally... Jimmy from "1ROAD" puts all of these ideas into practice with a Hands-On DRL Upgrade R&R: