A reciprocating engine will always vibrate when it’s running, and not just because some parts go up and down or in and out.

How engine temperature sensors work and what they influence. And, we’ll examine some unusual coolant temperature sensor monitoring methods employed by PCMs from different manufacturers.

It doesn’t have to be that way. This article begins a series of articles on electrical circuit analysis that will help you understand the operating principles of electric circuits. It will help you troubleshoot tough electrical problems and give you the “circuit savvy” to attack difficult electrical problems with confidence.