Stop Misdiagnosing Series Circuits (Automotive Example)

Описание: Most people learn Ohm’s Law while studying for a test, but struggle to relate it to real automotive circuits.

In this video, I break down Ohm’s Law in a true series circuit using a real steering wheel control wiring diagram. We calculate total resistance, determine circuit amperage, and predict voltage drop before ever touching the vehicle.

You’ll learn:
Why current stays the same in a series circuit
Why voltage divides across resistors
How the BCM sensing resistor knows which button you pressed
How added resistance (corrosion, poor connections) causes misdiagnosis
Why measuring voltage after the last load is a red flag

If you want to stop guessing and start predicting what your meter should read, this is the foundation.

Tools Used in This Diagnosis:
Automotive Jumper Wire Kit - https://amzn.to/4ru9u7n
Professional Scan Tool - https://amzn.to/474bw5I
Digital Multimeter - https://amzn.to/4tDNhoG
As an Amazon Associate, I earn from qualifying purchases. These are tools I personally use in electrical diagnostics.

Watch next:
   • How to Read Automotive Wiring Schematics f...  
   • Steering Wheel Controls: Understanding the...  
   • Automotive Relay Wiring + Basics Explained  

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Chapters:
00:00 Why Most Techs Misunderstand Ohm’s Law
00:33 Real Automotive Series Circuit Example
01:06 Series Circuit Rules Explained
02:32 How Voltage, Current & Resistance Behave
06:58 Ohm’s Law Refresher
08:51 Calculating Circuit Amperage
11:52 Voltage Drop Across Resistors
13:13 How the BCM Knows Which Button You Pressed
13:57 How Corrosion Causes Wrong Button Signals
17:36 Voice Button Full Circuit Breakdown
19:59 Recalculating Amperage (New Series Path)
25:13 What the BCM Actually Sees
26:36 Why Voltage After the Last Load Is a Problem
28:32 Final Diagnostic Takeaways