My brake fluid tester sits in a drawer in my box, patiently waiting to dip its little legs in pools of iffy brake fluid. It really isn’t a tool I think about much, even while I’m using it. It’s that simple. Or at least I thought it was. Much like the tester you...

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...

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...