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The bulbs and or sockets are dirty/corroded and need either cleaned or replaced. The corrosion causes the light to not have a good ground contact, therefore the circuit's power is finding it's way through other systems.

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โˆ™ 2006-07-25 17:25:14
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Q: What could be wrong with a 2003 Chevy pickup when the brake light works on the cab but not at the tail light lens and the brake light stays lit on the passenger side if the running lights are on?
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