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2018 Mirage ES - Random Electrical Flickering & Radio Reset

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Mike T. · rep 0 · May 22, 5:34 AM · 1 replies · solved · Question

Vehicle: 2018 Mitsubishi Mirage ES

Hi all,

My 2018 Mitsubishi Mirage ES has been acting really strange lately. While driving, the dash lights will randomly flicker, the radio cuts out and resets itself, and sometimes even the headlights seem to dim for a second or two. It's completely intermittent and doesn't seem to be triggered by bumps or specific driving conditions.

I'm worried this is a sign of a major electrical problem. The car starts fine every time, so I don't think it's the battery, but I'm not sure what else to check. Any ideas on what could be causing these random electrical glitches?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 5:34 AM

0

ClearTheCode admin answer:

Intermittent electrical flickering and resets in your 2018 Mitsubishi Mirage ES often point to issues with the vehicle's power supply or grounding. While the car starting fine suggests the battery isn't completely dead, it doesn't rule out other related components.

Here's a systematic approach to diagnose the problem:

  1. Battery Terminals and Cables: Start by checking the battery terminals. Ensure they are clean, tight, and free of corrosion. Loose or corroded terminals can cause intermittent power loss. Also, inspect the battery cables for any signs of damage or fraying.
  2. Alternator Output: The alternator is responsible for charging the battery and powering the electrical system while the engine is running. A failing alternator or one with an intermittent fault can lead to voltage drops. Have your alternator tested at an auto parts store or a mechanic. A healthy alternator should put out around 13.5-14.5 volts.
  3. Ground Connections: Poor ground connections are a very common cause of mysterious electrical problems. Check the main ground strap from the battery to the chassis, and from the engine to the chassis. Ensure they are clean and securely fastened. Corroded or loose grounds can create high resistance, leading to voltage fluctuations.
  4. Parasitic Draw: While less likely for flickering, a significant parasitic draw could weaken the battery over time, making the system more susceptible to voltage drops from other issues. This usually manifests as a dead battery after sitting.

When to See a Shop:

If checking the battery terminals and main ground connections doesn't resolve the issue, or if you can't test the alternator yourself, it's best to consult a professional mechanic. They can perform a comprehensive electrical system diagnostic, including load testing the battery, checking alternator output under various conditions, and tracing potential wiring faults. They can also check for specific fault codes that might not trigger a Check Engine Light but are stored in the vehicle's body control module (BCM).

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