VIDEO: Diagnosing Failing And Unresponsive Relays – UnderhoodService

VIDEO: Diagnosing Failing And Unresponsive Relays

Andrew Markel explains how to diagnose relays that are failing or unresponsive. Sponsored by Standard.

Voltage Drop Testing

The measurement of voltage is like the speed of the traffic.

Picture your local freeway. When the traffic is light, the traffic flows at the same speeds, even if there is a lane closure. As the number of cars increases for rush hour, the speeds slow down. A lane closure can cause traffic to come to a standstill. 

In this example, the cars during rush hour are like load and power in a starter motor on a circuit. The lane closure is like a bad connection or damaged wire. With light traffic loads, the speed of the traffic will not slow down as lanes merge. But, during rush hour, the speeds drop and the backup builds. In an electrical circuit, the resistance produces heat.

Spark Plug Fouling

Understanding why spark plugs get dirty.

Why Alternators Are Subject To Ripple Voltage

The alternator produces an AC current that must be converted into DC current by way of a rectifier.

Understanding Stop/Start Charging and Starting Systems

The problem may not have been caused by a complicated reason, something simple may have caused the system not to work.

Remanufacturing And The EV-Battery Challenge

One researcher is particularly interested in the fate of EV batteries once they reach the end of their automotive lifecycle.

Other Posts

Why Is This Brand New PS Pump So Noisy? (VIDEO)

There are several questions which you should ask yourself in this scenario. This video is sponsored by Rislone.

Techs Want Quality – So Do Customers (VIDEO)

High-quality parts and trusted brands are at the top of every technician’s list. Sponsored by The Group Training Academy.

Don’t Guess Which Repair Parts Are Right (VIDEO)

What’s in the box is critical when it comes to a successful repair. Sponsored by The Group Training Academy.

Your Recommendations Matter To Customer Selection (VIDEO)

Your customers view you as the expert and are there, because they trust you. Sponsored by The Group Training Academy.