Brake light doesn't work with running lights on...

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June 26th, 2012, 3:43 PM

BADchevy

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Brake light doesn't work with running lights on...

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ontVertAlignInTxbx/> <w:Word11KerningPairs/> <w:CachedColBalance/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> <m:mathPr> <m:mathFont m:val="Cambria Math"/> <m:brkBin m:val="before"/> <m:brkBinSub m:val="--"/> <m:smallFrac m:val="off"/> <m:dispDef/> <m:lMargin m:val="0"/> <m:rMargin m:val="0"/> <m:defJc m:val="centerGroup"/> <m:wrapIndent m:val="1440"/> <m:intLim m:val="subSup"/> <m:naryLim m:val="undOvr"/> </m:mathPr></w:WordDocument> </xml><![endif]--> I'm having this really weird issue with the left tail lights on my '98 C1500 Truck. When the night running lights are switched on, the left brake light and turn signal does not work, but the night running light does work. When the night running lights are switched off the tail lights work normally (brake light, turn signal). The right tail light functions normally in all states.
I have already replaced:
1. Bulbs
2. Tail Light Circuit Board
3. Tail Light Connector Harness
I have also checked the fuses and those are all normal.
Any thoughts? I'm at a loss. Thanks in advance for the help.

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July 2nd, 2012, 3:15 PM

lee714

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You may need to swap out the connectors

try adding extra ground jumper see if that changes it. is this the original problem or did it happen when you changed the housing? You can try individually switching out the connectors on the harness. These guys sell a lot of connectors individually you may want to try: terminalsandconnectors.com.

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June 10th, 2013, 1:29 PM

John Ortega Martinez

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I have a 2000 silverado 1500 and I installed 60w led for my low beams as soon as I turned off the truck my passenger (right) tail light went out and I checked all the bulbs and they work. So at night both brake lights work but the passenger running light is not on but the left one is. Same goes for the license plate lights the left one works but right one doesn't. Need help ASAP if anyone knows!