Lemmy explains why this basic task always comes before removing the positive cable to help you understand the theory behind the practice.
Why We Take the Negative Battery Cable off First and Put It on Last (VIDEO)
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HOT OFF THE PRESS
Side Business
Don’t leave alternative vehicles on the sidelines.
Power and Ground Testing on an Electrical Circuit
The first steps you should perform when something electrical doesn’t work right.
ADAS Repairs: Why Calibration Is A Must
As ADAS becomes standard on modern vehicles, post-repair calibrations are a critical safety and legal requirement for every shop.
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SHOP STUFF
Auto care news and advice you can use.
Engine Management and Fuel Trim – ASE Practice Question (VIDEO)
Technician A says the ECM’s main job is to keep emissions within certified limits. Technician B says fuel trim PIDs show corrections to fuel calculations. Who is correct?
The Real Meanings Behind OBD-II Diagnostic Trouble Codes (VIDEO)
By breaking down the structures used to create DTCs, you can learn how to “decode” beyond the simple descriptions presented by a scanner.
What’s Torque-to-Angle All About?
It’s like torquing a bolt, but with an extra twist.
Hybrid A/C Compressor Oil-ASE Practice Question (VIDEO)
On a hybrid vehicle’s air conditioning system that utilizes a high voltage electrical compressor, can only the oil specified by the vehicle manufacturer be used in the compressor or is PAG oil acceptable for use in an electric vehicle’s compressor?
Troubleshooting a “No A/C Compressor Engagement” Fault
Why a compressor clutch doesn’t engage, and tips to find the cause quickly.
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SHOP STUFF
Auto care news and advice you can use.
EDC: Mechanic Edition
Pocket check!
Diesel Engines and Racing
You may be surprised at how diesels have made a name for themselves in motorsports.
Recovering A/C Refrigerant-ASE Practice Question (VIDEO)
Technician A is preparing to recover the refrigerant from a customer’s vehicle. What are the steps he should take when performing this service?
The Folded Paper Era and Beyond: Giorgetto Giugiaro’s Iconic Design Journey
Giorgetto Giugiaro influenced everything from groundbreaking supercars to beloved city vehicles.
Is It Ever Safe to Reuse Torque-to-Yield (TTY) Fasteners? (VIDEO)
Pete Meier explains why these single-use bolts should always be replaced for safety and proper function.
VIDEOS
Hand in Glove: EV and Hybrid Service Safety
Glove testing is important; don’t skip it.
Symbol of a Stumble: Edsel’s “Horse Collar” Grille
This one part became the symbol of the Edsel’s failure.
Don’t Get Hung Up on Hanging Calipers
A household trick to save time — and brake hoses.