Learn how to diagnose active wheel speed sensors, avoid ABS misdiagnosis, and prevent costly comebacks in your shop.

He earned his reputation as a National Electrical Code (NEC) expert by working his way up through the electrical trade. Formally a construction editor for two different trade publications, Mike ...

Q. What does the Code define as a multiwire branch circuit? A. A multiwire branch circuit consists of two or more ungrounded circuit conductors with a common neutral conductor. There must be a ...

GM made it very clear that these codes are circuit codes and not sensor codes. For example, Code 13 means the oxygen-sensor circuit does not see enough activity.