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Discussion Starter · #1 ·
hey the side markers on my tj keep going off and on. sometime there working and sometimes there not. im thinking its a bad ground any idea where the ground would be for those?
 

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It could be ground or power. The only way to determine is to get on the socket terminals when they are not working and see what is missing +/-. Is it ALL markers or just one? Tailighs also come on with the parking lights on. Are they working?
 

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The side markers have no dedicated ground. They ground through the opposite + lead and filament in the front fender lamp (it's known as a "floating" ground). If your front fender lights are staying on continuously, it's most likely a bad connection or corroded lamp socket in your side marker light, or could be the same in the front parking/turn signal connection/socket.
 
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