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I had the taillight issue with the ground wire too small and melting the plug. I grounded the wire directly to the chassis, so that fixed the dim issue and the melted plug. I also bought LED resistor bulbs. They worked for about 50 miles. Now the right rear taillight doesn't work. If I touch a test light to the hot wire, 3 seconds later, the taillight will come on. Take the probe away, 3 seconds later, the taillight goes off. Seems like the resistor load may not be enough? Has anyone soldered a resistor to ground to add load? Should I go to regular cheap-*** bulbs again? Or maybe I'm going the wrong direction with my thinking. Thanks for any suggestions. Maybe a wire diagram would help. Any link to the taillight circuit would be very helpful.
When LED bulbs were first coming out years ago i installed some in my car and had to experiment with different resistors to get them to work/flash properly. I remember they got screaming hot. Now i just stick to the recommended bulbs, except for the low beams where i replaced the halogen for an HID kit.
Im guessing the LED bulbs you installed arent the correct ones. I have no idea which ones would work. i would stay away from the low priced ones.
You will have to match the voltage of the original bulbs. I wrote them down on the bulb sheet.
I had the taillight issue with the ground wire too small and melting the plug. I grounded the wire directly to the chassis, so that fixed the dim issue and the melted plug. I also bought LED resistor bulbs. They worked for about 50 miles. Now the right rear taillight doesn't work. If I touch a test light to the hot wire, 3 seconds later, the taillight will come on. Take the probe away, 3 seconds later, the taillight goes off. Seems like the resistor load may not be enough? Has anyone soldered a resistor to ground to add load? Should I go to regular cheap-*** bulbs again? Or maybe I'm going the wrong direction with my thinking. Thanks for any suggestions. Maybe a wire diagram would help. Any link to the taillight circuit would be very helpful.
It may be a water issue. If you need an almost new set of tails (20K miles off a 2012 C350) PM me.
Last edited by California; Feb 6, 2025 at 01:07 AM.
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
