Intermediate
4 lessons
130 min
Automotive Electrical Systems
Follow the 12 V energy path through a vehicle: battery and alternator, starter circuit, wiring and grounds, and the lighting and accessory loads that reveal electrical faults.
Course progress
0 / 4 lessons · 0%
Progress is stored in this browser session. Sign in to keep it with your account.
What you will learn
- Explain the battery and charging system relationship
- Calculate the current and voltage drop in a cranking and wiring circuit
- Diagnose a high-resistance ground from voltage-drop measurements
- Explain how lighting and accessory loads are switched and protected
Prerequisites. DC fundamentals and Ohm’s law · Voltage, current and resistance measurement with a multimeter · Basic vehicle electrical vocabulary
Advertisement
Course lessons
1
Automotive Battery and Charging
What a 12 V lead-acid battery stores, how the alternator replenishes it, and why open-circuit voltage alone do...
35 min →
2
Starting and Cranking Systems
The starter motor’s high current demand, the control circuit that engages it, and the voltage drops that preve...
30 min →
3
Automotive Wiring and Grounds
Wire sizing, voltage drop, connectors and the return path through the body, with a voltage-drop diagnostic tha...
35 min →
4
Lighting and Accessories
How lighting and accessory loads are switched, protected and dimmed, and how a load calculation guides fuse an...
30 min →