You've learned the parts. Can you diagnose the system?
A customer's description is the start of an investigation, not a diagnosis. Your task is to collect evidence that distinguishes a failed component from a failed circuit path.
What you will demonstrate
Trace power and ground, select appropriate measurements, interpret loaded voltage drops, identify a likely fault, plan a repair, and explain what would confirm it.
How to complete the capstone
Read the workflow, solve all four simulated cases, earn at least 10/12 on the knowledge check, and complete the separate instructor-supervised skills checklist.
Five moves before you replace a part
Confirm the complaint and operating condition. Decide which system is involved.
Locate source, protection, switching, load and return on the correct schematic.
Choose a safe, informative test under the specified operating condition. Record actual results.
Compare supply, loaded component and return behavior. Reject explanations contradicted by the readings.
Correct the cause using an approved procedure; repeat the original operating test and relevant measurements.
Voltage measured at one point relative to battery negative is not the same as voltage across a component. Across-test readings require a defined pair of test points. A high voltage on the return side can indicate an open ground, not a working ground.
Four cases. Evidence before conclusions.
Select a customer complaint, request virtual tests, then choose the supported diagnosis, corrective action, and verification. All cases use illustrative 12 V low-voltage systems. The correct answer is not revealed until you collect the required evidence.
Your case report
Completed cases and the diagnostic measurements you requested are recorded here. Use this as a conversation starter with an instructor; it does not certify hands-on skill.
12 questions. One diagnostic mindset.
Answer every question, then review the reasoning for each answer. The practice target for this capstone is 10 of 12. Retake it after reviewing the feedback.
Your best score will appear here.
Demonstrate it outside the screen
Use an instructor-approved, appropriately protected low-voltage trainer or vehicle and correct service information. These checks are for practice planning. Only an instructor can verify physical competence. This browser cannot confirm that a task was performed.
Checkboxes are learner self-reports only. Have your instructor review measurements, safety, work quality, and any relevant shop competency rubric separately.
Unit 8 completion check
This is the final Electrical Fundamentals unit in our eight-unit standalone development sequence. The units have not yet been integrated into the main Autonatomy site. Browser practice records from one HTML file are not automatically combined with other units or synced across devices.