Lemmy explains why this basic task always comes before removing the positive cable to help you understand the theory behind the practice.

There’s no magic bullet, but sometimes one or two answers is the difference between pass and fail.
Dressing chisels and punches, however, is a housekeeping task I’ve found not everyone knows they should be doing, and dress your punches and chisels!
Hookin’ ain’t easy. Here’s what I wish I knew on Day 1.
It’s the perfect tool for some jobs.
Largely supercar fare, wild points of entry have no shortage of variety.
I really hope the whole week doesn’t go like this.
We read the astrological signs and predicted your automotive future.
Ford’s so-called fix for servicing corroded front springs was something neither drivers nor dealer techs were happy about.
Stop telling your customers otherwise—modern fuel systems don’t care.
Engine oil is a lubricant, but that’s not what the task’s title is referencing.
You don’t need to do anything—but if you do, there are only a few things worth doing.
Every tech has a story. What’s yours?