Uploaded March 2026 | Updated September 2026, 3 weeks ago
π Want to Learn More About Diagnostics?
Check out my field manual, Engine Performance Diagnostics, available as both an eBook and paperback at:
π https://linktr.ee/scannerdanner
π§ Looking for Deeper Training?
Whether you're a DIYer, an aspiring tech, or a professional looking to sharpen your skills, join ScannerDanner Premium for next-level diagnostics training:
π Join Here β 14 Days for $1
scannerdanner.com/join-scannerdanner-premium.html
On ScannerDanner Premium, you'll get:
*In-depth classroom lectures straight from my book
*Exclusive case studies with live vehicles pulled into class
*Real-time troubleshooting using proven methods
*Post help requests on our forum
*Fundamental training on diagnosing automotive electrical and electronics systems.
ScannerDanner Tools:
https://linktr.ee/scannerdanner
β οΈ Disclaimer:
ScannerDanner LLC is not responsible for misuse, unauthorized changes, or incorrect application of any information provided. Always follow proper safety protocols when using tools, equipment, or procedures discussed in this video. Use this content at your own risk.
00:00 Intermittent charging issue
01:28 Charging system explanation
03:03 Lab scope battery check
04:36 L terminal signal
06:35 Key-on waveform
08:24 Harness wiggle test
09:20 Harness inspection
10:38 ECM connector check
16:39 Signal check at ECM
18:47 Alternator tap test
19:55 Harness inspection
20:48 Intermittents suck
22:01 Customer update
π Want to Learn More About Diagnostics?
Check out my field manual, Engine Performance Diagnostics, available as both an eBook and paperback at:
π https://linktr.ee/scannerdanner
π§ Looking for Deeper Training?
Whether you're a DIYer, an aspiring tech, or a professional looking to sharpen your skills, join ScannerDanner Premium for next-level diagnostics training:
π Join Here β 14 Days for $1
scannerdanner.com/join-scannerdanner-premium.html
On ScannerDanner Premium, you'll get:
*In-depth classroom lectures straight from my book
*Exclusive case studies with live vehicles pulled into class
*Real-time troubleshooting using proven methods
*Post help requests on our forum
*Fundamental training on diagnosing automotive electrical and electronics systems.
ScannerDanner Tools:
https://linktr.ee/scannerdanner
β οΈ Disclaimer:
ScannerDanner LLC is not responsible for misuse, unauthorized changes, or incorrect application of any information provided. Always follow proper safety protocols when using tools, equipment, or procedures discussed in this video. Use this content at your own risk.
00:00 Intermittent charging issue
01:28 Charging system explanation
03:03 Lab scope battery check
04:36 L terminal signal
06:35 Key-on waveform
08:24 Harness wiggle test
09:20 Harness inspection
10:38 ECM connector check
16:39 Signal check at ECM
18:47 Alternator tap test
19:55 Harness inspection
20:48 Intermittents suck
22:01 Customer update

![Counter Fuel Trim and Injector Flow Waveforms [did we fix it?]
π Want to Learn More About Diagnostics?
Check out my field manual, Engine Performance Diagnostics, available as both an eBook and paperback at:
π https://linktr.ee/scannerdanner
π§ Looking for Deeper Training?
Whether youre a DIYer, an aspiring tech, or a professional looking to sharpen your skills, join ScannerDanner Premium for next-level diagnostics training:
π Join Here β 14 Days for $1
https://www.scannerdanner.com/join-scannerdanner-premium.html
On ScannerDanner Premium, youll get:
*In-depth classroom lectures straight from my book
*Exclusive case studies with live vehicles pulled into class
*Real-time troubleshooting using proven methods
*Post help requests on our forum
*Fundamental training on diagnosing automotive electrical and electronics systems.
ScannerDanner Tools:
https://linktr.ee/scannerdanner
β οΈ Disclaimer:
ScannerDanner LLC is not responsible for misuse, unauthorized changes, or incorrect application of any information provided. Always follow proper safety protocols when using tools, equipment, or procedures discussed in this video. Use this content at your own risk. Counter Fuel Trim and Injector Flow Waveforms [did we fix it?]](https://i.ytimg.com/vi/Kg6Bc545-zE/mqdefault.jpg)



![Live Training Event [we would love to meet you in person!] #automobile #mechanic #training #topdon
From TOOLS Pennsylvania: Weβre proud to welcome SD Charities Inc (sdcharities.org) back to this yearβs event as they continue their mission to support the automotive community and beyond. π
π’ Silent Auction Alert! π’
Get ready to bid on amazing items to help raise funds for this incredible cause. But hereβs the catch: the only way to participate is to attend TOOLS 2025!
Donβt miss your chance to support SD Charities and take home something special.
Register now! midatlanticaca.org
@TOPDONUSA
#topdon
#training
#automobile Live Training Event [we would love to meet you in person!] #automobile #mechanic #training #topdon](https://i.ytimg.com/vi/LJHcpEIIANQ/mqdefault.jpg)




