H-115 Troubleshooting Automotive Relay Circuits with Vince Fischelli

Troubleshooting Relays can be a difficult electrical task given all the possibilities of how a relay circuit can fail and replacing the relay does not fix the relay circuit problem. It’s time to start troubleshooting the relay circuit with a DMM following a logical troubleshooting sequence. The Relay Circuit Troubleshooting Trainer, H-115 contains the H-PCB05 circuit board shown in this video. Connect to the Power Board from the H-111A Starter Kit to complete the relay circuit. How spike sup0ression diodes work and how to test then. Follow exercises to learn how relay circuit work and how they fail. There are 75 relay circuit problems for practice troubleshooting to develop relay circuit troubleshooting skill and confidence.