Only the two outboard lights are working as brake lights. All four light up as running lights but still only two brake lights. I have changed bulbs and jiggled the connections. It's been a while but I though all four worked as brake lights before. Any suggestions?
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Re: 67 Brake lights
Check for a loose or broken ground strap, Each tail lamp has a ground in the wiring harness that attaches to the lower mounting shaft. It's fairly easy to reach with a sidepipe car but may be more difficult with the under car exhaust. It is very easy to check if you remove the rear valance. Without the ground you would have the dimmer running lights but no bright brake lights.
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