For more automotive training, sign up for ScannerDanner Premium https://www.scannerdanner.com/join-scannerdanner-premium.html The cost is $11 a month giving you access to over 420 training videos and counting. Tests shown - how to use GM misfire data during diagnostics - understanding ignition coil control circuit design - ignition module transistor operation and testing - how to scope test an ignition module with voltage and current - how to test an ignition module with a test light - how to oh