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3. Isolate the problem by testing the circuit
Make circuit tests to check the diagnosis you made in step 2. Keep in mind that a logical, simple procedure is the
key to efficient troubleshooting.
Test for the most likely cause of failure first. Try to make tests at points that are easily accessible.
4. Fix the problem
Once the specific problem is identified, make the repair. Be sure to use proper tools and safe procedures.
5. Make sure the circuit works
Turn on all components in the repaired circuit in all modes to make sure you've fixed the entire problem. If the
problem was a blown fuse, be sure to test all of the circuits on the fuse. Make sure no new problems turn up and
the original problem does not recur
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