If you work on cars you’ve probably heard of relays; in fact, we often cover using relays in our tech articles. Following detailed instructions to wire one can work, but understanding what makes them ...

Latching relays latch mechanically or magnetically so you don’t have to maintain current running through the coil to keep them on. Latching relays latch mechanically or magnetically so you don’t have ...

An automotive relay works by using electromagnetism to change small levels of input electricity into larger current outputs. When an electric signal is sent to the relay, electromagnets form or break ...

A friend once asked about the block of relays pinned to a board behind my car's dash. To him relays were the mysterious little boxes that some cars inexplicably required to operate a horn. More than ...

Over my almost 60 years in the auto repair industry as an ASE and GM Master Technician, and vocational education automotive technology instructor, I have seen firsthand how vehicles have evolved from ...