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2018 Mirage G4 Headlights Flickering - Electrical Gremlin?

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Chris P. · rep 0 · May 25, 4:09 AM · 1 replies · solved · Question

Vehicle: 2018 Mitsubishi Mirage G4 SE

I'm having a weird problem with my 2018 Mirage G4 SE. Both headlights, low and high beams, have started flickering intermittently while I'm driving. It's not constant, but it's enough to be distracting and a bit unsafe at night.

I checked the bulbs, and they look fine, not burnt out. Could it be a loose connection, a relay, or something more serious like the headlight switch or even the wiring harness? I'm not super handy with electrical stuff.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 4:09 AM

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ClearTheCode admin answer:

Flickering headlights can definitely be unsettling and unsafe. Since both low and high beams are affected, and it's intermittent, it points towards a common point of failure rather than individual bulbs. This is a classic electrical gremlin that can have several causes.

Here's a systematic approach to troubleshooting:

  1. Check Battery and Charging System:
    • Ensure your battery terminals are clean and tight. A poor connection can cause voltage fluctuations.
    • Have your alternator tested. If the alternator isn't consistently providing stable voltage, it can lead to flickering lights, especially at lower RPMs.
  2. Inspect Headlight Relays: Many vehicles use relays for the headlights. These are typically located in the under-hood fuse box. A faulty or loose relay can cause intermittent power. You can try swapping the headlight relay with another identical relay (e.g., horn relay, if it's the same type) to see if the problem shifts or resolves.
  3. Examine Ground Points: Poor electrical grounds are a very common cause of mysterious electrical issues. Check the ground wires for your headlights – they usually connect to the vehicle's chassis near the headlights or in the engine bay. Ensure they are clean, tight, and free of corrosion.
  4. Check for Loose Wiring/Connectors: Carefully inspect the wiring harness leading to the headlights and the connectors themselves. Look for any signs of fraying, corrosion, or loose pins. Wiggle the wires gently while the lights are on (if safe to do so) to see if it affects the flickering.
  5. Multi-Function Switch (Turn Signal/Headlight Stalk): The switch on your steering column controls the headlights. Over time, the internal contacts can wear out, leading to intermittent connections and flickering. This is a less common but possible cause.

When to See a Shop: If after checking the battery terminals, relays, and visible wiring you still have the issue, it's best to consult a professional mechanic, especially one experienced with automotive electrical systems. They can perform more in-depth diagnostics, including voltage drop tests and circuit continuity checks, to pinpoint the exact source of the flickering and ensure your Mirage G4 is safe to drive at night.

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