2019 Subaru Forester Dash Lights Dimming: Fix Flickering Display

Is your 2019 Subaru Forester's instrument cluster playing tricks on you? Many owners report the dashboard lights or entire instrument panel intermittently dimming, flickering, or even going dark while driving. This isn't just an annoyance; it can impact your ability to see critical information like speed, fuel level, and warning lights, posing a safety concern. Understanding the root cause of this electrical quirk is key to a reliable fix.

What drivers notice on this 2019 Subaru Forester

Drivers of the 2019 Subaru Forester often describe a range of behaviors related to their dash lights. It's rarely a complete, permanent failure, but rather an intermittent problem that can be frustrating and distracting. The issue might appear suddenly or worsen over time, often correlating with specific driving conditions or electrical load changes.

At a glance: difficulty, repair cost, and diagnostic workflow

• Difficulty Rating: 6/10 — Moderate
• Common Symptoms: Intermittent dimming: The entire instrument cluster or specific sections (e.g., speedometer, tachometer) become noticeab; Flickering lights: Dash lights rapidly flash on and off or vary in intensity, similar to a loose connection.; Complete, temporary blackout: The instrument cluster goes completely dark for a short period before coming back on.; Inconsistent brightness: The dash lights don't maintain a steady brightness level, even when the dimmer switch is set.
• Estimated Repair Cost: $100–$900 (parts + typical shop labor)
• OEM Tooling Required: Standard OBD-II scanner and hand tools

Diagnostic workflow:

1. Confirm the symptom on your vehicle.
2. Scan for stored or pending codes with an OBD-II tool.
3. Inspect the most common causes in this guide (visual checks first).
4. Run verification tests before replacing parts.
5. Repair, clear codes, and verify on a test drive.

Symptoms and warning signs

When your 2019 Subaru Forester dash lights start acting up, you might observe several tell-tale signs:

• Intermittent dimming: The entire instrument cluster or specific sections (e.g., speedometer, tachometer) become noticeably dimmer, then return to normal brightness.
• Flickering lights: Dash lights rapidly flash on and off or vary in intensity, similar to a loose connection.
• Complete, temporary blackout: The instrument cluster goes completely dark for a short period before coming back on.
• Inconsistent brightness: The dash lights don't maintain a steady brightness level, even when the dimmer switch is set.
• Warning lights affected: Critical warning indicators (check engine, ABS, airbag) may also flicker or dim along with the main display.
• Related electrical issues: Other interior lights, radio, or power accessories might also exhibit similar intermittent behavior.

How to verify and confirm the issue

Confirming the issue often involves observing the symptoms under various conditions and performing a few diagnostic checks. Since the problem is often intermittent, patience is key.

• Observe patterns: Note when the dimming or flickering occurs. Does it happen over bumps? When turning on specific accessories (headlights, AC, defroster)? At certain RPMs? This can help narrow down the cause.
• Check dimmer switch: Rotate the dimmer switch for the instrument panel lights fully up and down several times. Sometimes, a dirty or faulty dimmer switch can cause intermittent contact issues.
• Battery and charging system check: A weak battery or failing alternator can lead to voltage fluctuations. Check your battery's voltage (should be around 12.6V engine off) and the charging voltage (13.5-14.5V engine running). You can find more general diagnostic tips in our All repair guides.
• Visual inspection: Carefully inspect the wiring harness leading to the instrument cluster and the fuse box for any signs of corrosion, loose connections, or damaged wires. This might require removing trim panels.
• Scan tool for voltage drops: While there might not be a specific OBD-II code for dash light dimming, a professional scan tool can monitor live data, including battery voltage and body control module (BCM) inputs/outputs. Sudden voltage drops could indicate an underlying electrical problem. For more information on using scan tools, visit our Browse OBD-II codes section.

Common causes (most likely first)

The electrical system of a modern vehicle like the 2019 Subaru Forester is complex. Several factors can contribute to dash lights dimming or flickering:

• Faulty dimmer switch: Over time, the rheostat in the dimmer switch can wear out or accumulate dirt, leading to intermittent contact and inconsistent brightness.
• Loose or corroded electrical connections: Connections at the instrument cluster, fuse box, ground points, or even the battery terminals can become loose or corroded, causing voltage drops.
• Weak battery or failing alternator: An aging battery struggling to hold a charge or an alternator not consistently providing sufficient voltage can cause the entire electrical system, including dash lights, to fluctuate.
• Faulty instrument cluster: The internal components or circuit board of the instrument cluster itself can develop issues, leading to display problems. This is less common but possible.
• Body Control Module (BCM) issues: The BCM manages many of the vehicle's electrical functions, including interior lighting. A fault within the BCM could send incorrect signals to the dash lights.
• Wiring harness damage: Chafed, pinched, or corroded wiring within the dashboard or engine bay can disrupt power flow to the instrument cluster.

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Step-by-step diagnosis and fixes

Addressing the dimming dash lights on your 2019 Subaru Forester requires a systematic approach:

1. Check and clean battery terminals: Ensure battery terminals are clean and tight. Corrosion here is a common culprit for various electrical gremlins.
2. Test battery and alternator: Use a multimeter to check battery voltage (engine off) and charging voltage (engine running). If either is out of spec, address the battery or alternator first.
3. Inspect dimmer switch: With the vehicle off, cycle the dimmer switch through its full range multiple times. If the issue temporarily resolves or changes, the switch might be faulty. Consider removing and cleaning the contacts or replacing the switch.
4. Check fuses: Locate the fuse box (usually under the dash and in the engine bay) and inspect all fuses related to the instrument cluster, interior lights, and BCM. A blown or loose fuse can cause intermittent issues.
5. Inspect ground points: Locate and inspect common ground points for corrosion or looseness. Poor grounds can cause erratic electrical behavior. Consult a service manual for specific ground locations for your Subaru Forester.
6. Examine instrument cluster connections: If comfortable, carefully remove the dashboard trim to access the back of the instrument cluster. Check that all electrical connectors are securely seated and free of corrosion. Disconnect and reconnect them to ensure good contact.
7. Professional diagnosis: If basic checks don't reveal the problem, a professional technician with advanced diagnostic tools can perform more in-depth testing of the BCM, wiring harnesses, and instrument cluster components. For more information on your vehicle's systems, you can explore the Subaru vehicle hub.

Repair options and cost factors

Repair options and associated costs for dimming dash lights vary significantly depending on the root cause:

• Battery/Alternator replacement: If these components are failing, replacement is necessary. This is a common automotive repair.
• Dimmer switch replacement: A relatively inexpensive part, but requires some dashboard disassembly.
• Cleaning connections/grounds: Often a DIY fix with minimal cost, primarily time and basic tools.
• Wiring harness repair: Can range from simple splice repairs to more extensive harness replacement, depending on the damage.
• Instrument cluster repair/replacement: This can be one of the more expensive fixes, as the cluster itself is a complex electronic component. Sometimes, specialized shops can repair clusters, or a new/remanufactured unit may be required.
• BCM diagnosis and repair/replacement: BCM issues often require dealer-level diagnostic equipment and can be costly to replace and program.

When to see a professional

While many basic checks can be performed by a DIY owner, there are clear instances when professional help is advisable:

• Intermittent issues persist after basic checks: If you've checked the battery, alternator, fuses, and dimmer switch without success.
• No clear cause found: When you can't identify any obvious loose connections or damage.
• Lack of specialized tools: If you don't have a multimeter, scan tool, or the necessary tools to safely access dashboard components.
• Concern about safety: Any electrical issue that affects critical vehicle information or could lead to further damage should be addressed by a qualified technician.
• Symptoms worsen or spread: If other electrical components start failing or the dash lights go completely dark more frequently.

Frequently asked questions

Can a low battery cause dash lights to dim on a 2019 Subaru Forester?

Yes, absolutely. A weak or failing battery can lead to insufficient voltage being supplied to the vehicle's electrical system, causing components like the instrument cluster lights to dim or flicker intermittently as the voltage fluctuates.

Is a flickering dash light a sign of a bad alternator in a 2019 Subaru Forester?

It can be. If your alternator isn't consistently charging the battery or providing stable voltage, the electrical system, including your dash lights, may experience power fluctuations, manifesting as flickering or dimming. This is often accompanied by other electrical issues or a battery warning light.

How do I reset the instrument cluster on my 2019 Subaru Forester?

There isn't a simple

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