Brake light issues

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Joined
Dec 5, 2025
Threads
3
Messages
13
Location
Union, KY
Hey all, I'm having a real hard time diagnosing this brake light issue. Originally, my tail lights and brake lights were not giving anything. Through screwing with the trailer wiring adapter (small box in the passenger rear quarter panel) I have restored running tail lights to both sides and the passenger rear brake light. However, the driver-side tail light isn't giving braking light. Couldn't find anyone else with that specific issue. I did have the battery out for about a week, reinstalled, and started having the issues. The third brake light never had an issue. Anyone have a fix or where else to look?
 
It's a light bulb.
You need +12 and ground.

The trailer harness in the rear right quarter panel is likely an aftermarket Hopkins unit. It can be removed and the OEM connectors reconnected.

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Never got around to deleting this before you chimed in but yeah it was the bulb😅. Really simple fix just had to replace the bulb. Should I delete the thread? Kinda seems irrelevant to keep up.
 
Never got around to deleting this before you chimed in but yeah it was the bulb😅. Really simple fix just had to replace the bulb. Should I delete the thread? Kinda seems irrelevant to keep up.
Eh, could serve as a good reminder to us all to not change the head gasket next time the rear washer fluid stops spraying
 
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