Lighting System Problems Analysis Cases

Analysis of headlight, taillight, and other automotive lighting system issues.

2003 Jeep Wrangler Gauge Light Issue After Alternator Short
2003 Jeep Wrangler
The owner accidentally shorted the alternator while working on the engine, resulting in a damaged regulator casing. After testing the alternator under...
Jeep Wrangler gauge light
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2006 Toyota Tundra Gauge Cluster Backlight Issues
2006 Toyota Tundra
The gauge cluster backlight and A/C knob lights on my 2006 Toyota Tundra are completely out. I tried adjusting the dimmer switch and checking the fuse...
Toyota Tundra gauge cluster
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2005 Subaru Legacy Backup Lights Electrical Issue
2005 Subaru Legacy
The owner of a 2005 Subaru Legacy (non-turbo, automatic) reports that the backup lights are not functioning. They've replaced fuses #18 and #8, and ch...
Subaru Legacy backup lights
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2000 Honda Civic Engine Light Diagnosis
2000 Honda Civic
The owner reports that the engine light illuminates after driving for about 15 minutes, once the engine reaches normal temperature. The light turns of...
Honda Civic O2 Sensor
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1998 Cadillac STS Intermittent Check Engine Light Issue
1998 Cadillac STS
The owner has been experiencing an intermittent check engine light on their 1998 Cadillac STS for over a year. They report that the vehicle shows code...
Cadillac STS check engine light
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2006 Dodge Ram Fog Lights Not Functioning
2006 Dodge Ram
The fog lights on the 2006 Dodge Ram have stopped working. The owner checked for power at the plugs and confirmed there is power. The dashboard indica...
Dodge Ram fog lights
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1998 Mazda Millenia Check Engine Light - Misfire in Cyl #5
1998 Mazda Millenia
The owner reports that the check engine light has illuminated, and the engine is shaking. They have replaced the spark plugs, ignition wires, rotor, c...
Mazda Millenia check engine light
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1991 Dodge Truck Water in Oil Light On
1991 Dodge 2500
The owner of a 1991 Dodge 2500 Cummins truck reports that the 'water in fuel' light on the instrument panel remains illuminated. Despite the warning l...
Dodge Cummins water in fuel
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2003 Dodge Intrepid Battery and ABS Light Issues
2003 Dodge Intrepid
The owner reports that their 2003 Dodge Intrepid was running well until the battery light illuminated, followed by the ABS light while driving. The ra...
Dodge Intrepid P0700
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Honda CRX Stuttering Under Light Stress Diagnosis
1989 Honda CRX
The owner of a 1989 Honda CRX HF with 197,700 miles reports a stuttering issue that has progressively worsened over the past half month. This problem ...
Honda CRX stuttering
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Turn Signal Failure with Intermittent Function
1999 Volvo S70
The owner of a 1999 Volvo S70 reports that the left and right turn signals function for about 30 seconds before stopping completely. However, the haza...
Volvo S70 turn signals
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1988 Volvo 240 No Brake Lights Diagnosis
1988 Volvo 240
The owner of a 1988 Volvo 240 reports that the brake lights are not functioning despite cleaning the sockets, changing the bulbs, and checking the bra...
brake lights electrical systems Volvo 240
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2002 Jeep Liberty: Check Engine Light and Black Smoke
2002 Jeep Liberty
The owner reports that their 2002 Jeep Liberty is experiencing a flashing check engine light, accompanied by black smoke from the tailpipe. The vehicl...
Jeep Liberty check engine light
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Brake Lights, Battery, and Speedometer Issues in 97 Altima
1997 Nissan Altima
The owner of a 1997 Nissan Altima reports that after a mechanic fixed the brake lights that wouldn't turn off, the battery light and brake light are n...
Nissan Altima brake lights
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Persistent Engine Light After Refueling
2005 Honda Accord
The owner of a 2005 Honda Accord 6-cylinder sedan reported that after refueling at a no-name gas station during a road trip, the engine light illumina...
Honda Accord engine light
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2006 Jeep Cherokee Fog Light Diagnostics
2006 Jeep Cherokee
The owner of a 2006 Jeep Cherokee reports that the fog lights are not functioning. They initially did not have a relay or fuse in position #15, which ...
Jeep Cherokee fog lights
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1993 Dodge Shadow Brake Light and Turn Signal Issues
1993 Dodge Shadow
The owner reports that the driver side tail light works until the brake is applied, at which point it goes out. Additionally, the driver side turn sig...
Dodge Shadow brake lights
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2009 Pontiac G6 Security Light and Communication Issues
2009 Pontiac G6
The owner reports that the security light on their 2009 Pontiac G6 remained illuminated after a series of key cycles. Initially, the car also chimed a...
Pontiac G6 security light
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