Electrical System Fault Analysis Cases

Complete database of electrical system problems including battery issues, charging system failures, lighting problems, and sensor diagnostics.

Brake lights won't turn off
1998 Chevrolet Prizm
Chris has a 1998 Chevrolet Prizm with 80,000 miles. The brake lights remain illuminated even when the vehicle is off. He attempted to pull the shaft o...
brake lights switch failure relay malfunction
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P0336 Code Diagnosis for 2003 Pontiac Bonneville
2003 Pontiac Bonneville
The owner of a 2003 Pontiac Bonneville reports a persistent P0336 code, indicating a crankshaft position sensor issue. They had the vehicle serviced a...
P0336 CKP sensor Pontiac Bonneville
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1996 GMC Jimmy Brake Light Issue Analysis
1996 GMC Jimmy
The brake lights on my 1996 GMC Jimmy are not functioning properly. While the high mount brake light works when the brake is depressed, the lower brak...
GMC Jimmy brake lights
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1997 Oldsmobile Cutlass Check Engine Light Diagnosis
1997 Oldsmobile Cutlass
The owner reports that the 'SERVICE ENGINE SOON' light is illuminated on their 1997 Oldsmobile Cutlass (V6 engine, approximately 275,000 miles). They ...
Oldsmobile Cutlass check engine light
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1999 Mitsubishi Montero Electrical System Issues
1999 Mitsubishi Montero
The owner of a 1999 Mitsubishi Montero is experiencing frequent electrical failures, having replaced the alternator twice and the battery three times....
Mitsubishi Montero electrical system
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1999 Ford Taurus Dome Light Electrical Issue
1999 Ford Taurus
The owner reports that the dome light in their 1999 Ford Taurus is not functioning properly. The light sometimes turns on when the doors are opened, b...
Ford Taurus dome light
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2003 Lexus GX 470 Check Engine Light and Suspension Issue
2003 Lexus GX 470
The owner of a 2003 Lexus GX 470 reports that the check engine light, along with VSC and VSC TRAC lights, illuminated. After clearing the codes, the l...
Lexus GX 470 Check Engine Light
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1998 Ford Windstar Daytime Running Light Module Issue
1998 Ford Windstar
The owner of a 1998 Ford Windstar LX is experiencing an issue where the daytime running lights remain on even after the vehicle is turned off. They ha...
Ford Windstar daytime running lights
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Odometer Dim Issue in 2005 Ford Freestar
2005 Ford Freestar
The owner of a 2005 Ford Freestar reports that the odometer is too dim to see when the car is started outside, although it is visible when started in ...
Ford Freestar odometer
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Intermittent A/C Issue in 2007 Volvo S40
2007 Volvo S40
The owner reports that the A/C in their 2007 Volvo S40 works intermittently, stopping unexpectedly. They have performed all basic A/C services, indica...
Volvo S40 A/C issues
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1996 Ford Taurus Engine Light After Cam Sensor Replacement
1996 Ford Taurus
The owner reports that the check engine light illuminated after replacing both cam sensors on their 1996 Ford Taurus. Despite the replacement, the tro...
Ford Taurus camshaft sensor
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2007 Toyota Camry Knock Sensor Issue Analysis
2007 Toyota Camry
The owner of a 2007 Toyota Camry with 140,000 miles reports that the check engine light is illuminated with a knock sensor code. After resetting the c...
Toyota Camry Knock Sensor
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2004 Peugeot 307 Fuel Sensor Problem
2004 Peugeot 307
The owner reported that after a full service, including the replacement of the anti-pollution filter and fuel filter, a warning beep and message to ch...
Peugeot 307 Fuel System
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1998 Subaru Legacy Transmission Light Blinking Diagnosis
1998 Subaru Legacy
The owner of a 1998 Subaru Legacy reports that the transmission light on the dashboard is blinking. They were informed that this could indicate a code...
Subaru Legacy Transmission
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Oil Level Light Activation Despite Normal Oil Level
2006 Pontiac Grand Prix
The owner of a 2006 Pontiac Grand Prix reports that the oil level light activates upon starting the vehicle, even though the oil level is confirmed to...
oil level sensor Pontiac Grand Prix diagnostics
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1996 Acura RL Cruise Control Diagnostic Analysis
1996 Acura RL
The owner reports that the cruise control system on their 1996 Acura RL is inoperative. The issue manifests itself when attempting to engage the cruis...
Acura Cruise Control Electrical Systems
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1998 Pontiac Transport Transmission Wiring Issues
1998 Pontiac Transport
The owner of a 1998 Pontiac Transport reports experiencing transmission problems. The vehicle has been displaying erratic shifting behavior, occasiona...
Pontiac Transport transmission
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2004 GMC Envoy Right Turn Signal Issue
2004 GMC Envoy
The owner reports that the right turn signal on their 2004 GMC Envoy blinks rapidly, suggesting a malfunction. They have verified that the bulbs and f...
GMC Envoy turn signal
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