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  #1  
Old 06-25-2022, 01:07 AM
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What is this box/circuit board under tail lights? (Pictures)

Found nice looking LED tail lights and was installing them, but noticed a little black box on the bottom.
Unscrewed the box and there's some circuit board inside with a bunch of resistors maybe?
Just wondering what it is and if it's replaceable, i.e. if I can buy this part separately.
So far tail light seem to work and turn signal as well, but it doesn't light up when I apply the break. Not sure if this is the reason.
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Old 06-26-2022, 03:55 PM
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seems like a bunch of resistors to tell the car the lights are working fine, they of course get hot so they should not be in a plastic box....
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Old 06-26-2022, 04:05 PM
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I'm wondering if I can just wire in a resistor instead of these. Just not sure the value...
I can probably code out the errors in ncs expert. Only issue right now is they don't light up with brakes applied. I'll try the other tail light for testing purposes.
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Old 06-26-2022, 04:31 PM
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Clean up both sides and take new pics to post.I can see they are marked R1 (?) through R8. R5 - R8 are the easiest to read.
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Old 06-29-2022, 02:43 PM
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Old 06-29-2022, 04:14 PM
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Those resistors looked toast - literally! Seem undersized for the amount of power going through them. A fire hazard waiting to happen - JMHO!
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Old 06-29-2022, 05:08 PM
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i can't see pictures... I'm wondering if its a browser issue, or so you all not see pics either?
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Old 06-30-2022, 06:05 PM
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Pictures are coming through fine with Chrome
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Old 07-08-2022, 02:42 PM
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I can probably just wire in another resistor in there but what size?
Will these work?


I've got one like this. Tried putting it in there, but it gets crazy hot. Not sure if it's normal or not
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