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Stress Test Vehicle Grounds

Pop quiz, no cheating: how many amps does the ground side of any circuit conduct? If you said, “As many as the hot side,” get yourself a gold star and skip this article. For the rest of us who weren’t born innately knowing the answer to that question, stick with me...

The Tightwad’s Way To Install Any Wheel Bearing Race

I don’t own a bearing race driver kit, and I haven’t in 20 years of fixing stuff. I also refuse to use sockets to drive a race. I learned a method a long time ago I’ll pass along to you newer techs: I use the race I’m replacing. I primarily have used this trick when...

Shop Profile: Locked N Loaded 4×4

I’ve owned two Jeeps–the 1973 Super Jeep CJ-5 featured in a previous Shop Press article, and a 2010 Wrangler Sahara. The reliability and my enjoyment of the former wasn’t “super” in any way despite American Motors’ best efforts at model name puffery, and the latter...

Check Out This Hacky Diag Tool

Disclaimer: Dorman Products purchased this kit at full price.In the interest of serious investigative reporting, I swiped the Shop Press credit card for $14.83 to try out a diag tool I thought looked super-cool: the relay bypass. What’s that? Short version: Imagine a...

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.

HOT OFF THE PRESS

Hybrid A/C Compressor Oil-ASE Practice Question (VIDEO)

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?

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SHOP STUFF

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Troubleshooting Fuel Trim–ASE Practice Questions (VIDEO)

Troubleshooting Fuel Trim–ASE Practice Questions (VIDEO)

Technician A and Technician B are discussing ways to use fuel trim as a troubleshooting aid. Technician A says that fuel trims that are correcting for a lean condition at high RPM and load conditions indicates a problem in fuel delivery. Technician B says that this condition is caused by a vacuum leak.

VIDEOS