Having electrical issues with your car can be incredibly frustrating. You may experience strange electrical gremlins that seem impossible to diagnose and repair. However, there is a little-known trick that can help you finally solve these annoying electrical problems for good.

Understanding Electrical Systems in Cars

Modern cars have complex electrical systems with miles of wiring and hundreds of connections. Key systems that rely on electrical power include:

With so many electrical components, there are countless points of failure that can cause frustrating electrical issues.

Common Electrical Problems in Cars

Some of the most common electrical problems in cars include:

These issues can cause symptoms like:

It's incredibly frustrating when you can't pinpoint the cause of these elusive electrical gremlins!

The Little-Known Trick - Use a Diagnostic Scanner

The secret trick that professional mechanics use to diagnose electrical issues is an advanced automotive scan tool. Also known as a diagnostic scanner, these devices plug into the OBDII port under the dash of most modern vehicles.

A quality scan tool like the Innova 3160g can read diagnostic trouble codes (DTCs) that indicate issues with sensors, solenoids, wiring, and electrical components throughout the vehicle. This takes much of the guesswork out of electrical diagnosis.

Here's why a scanner is so useful for tracking down electrical gremlins:

With a robust scanner that can graph sensor data, you can literally watch voltage, resistance, and output values in real-time. This makes it easy to catch electrical issues as they occur.

Step-By-Step Diagnosis Process Using a Scanner

Follow this process to banish those electrical gremlins for good:

  1. Connect the scan tool - Plug into the OBDII port under the dash and power on the scanner.

  2. Read codes - Pull any diagnostic trouble codes (DTCs) to identify components setting faults.

  3. Check live data - Watch sensor readings for abnormal or erratic values.

  4. Perform actuator tests - Use the scanner to turn components on and off to check operation.

  5. Look for intermittent faults - Drive the vehicle while monitoring scanner data to catch intermittent issues.

  6. Isolate the fault - Use process of elimination and testing to pinpoint the source of the electrical problem.

  7. Repair the faulty component - Finally fix the issue by replacing the malfunctioning electrical part.


Electrical gremlins in your car don't have to remain a mystery. Investing in an advanced diagnostic scanner gives you the tools to quickly track down elusive electrical faults. Following a systematic diagnosis process using live data enables you to isolate failures and make informed repairs. Banish those frustrating electrical demons for good using the incredible power of an automotive scan tool!