Curriculum
Module 03intermediate
Fuses, Relays & Distribution
Trace protection and power distribution through fuses, relay circuits, fuse boards and shared supplies.
Lessons
06
Estimated time
210 min
Completed
00/06
By the end of this module
Use loaded tests to find failed protection, relay control and distribution paths without guesswork.
Lessons
6 total
- 12Automotive fusesA fuse looks intact. Should you trust your eyes?Members only35 min
- 13Voltage drop across fuses and finding active circuitsWhy do you sometimes measure almost 0 V across a good fuse, but battery voltage across a blown one?Members only35 min
- 14Relay testingRelay clicks, component still dead. Is the relay actually working?Members only35 min
- 15Testing the relay socketYou replace a relay and nothing changes. The important test was underneath it all along.Members only35 min
- 16Fuse boards and power distribution modulesHalf the dashboard lights up after water gets into a fuse box. Why can one box create ten unrelated symptoms?Members only35 min
- 17One fuse, multiple systemsABS, gearbox, HDC and tyre-pressure warnings appear together. Four faults — or one shared electrical problem?Members only35 min