Junk amazon LED Headlight question

[dadbodsquarebod]

Ok so I have a feeling the answer is in the question here but I need someone smarter than myself to tell me to toss them.

I bought some cheapo LED lights at a swap meet and tried to pop one in to see how silly they looked. But it didn’t work at all. Had the LED in the driver side and the old one in the passenger side. Pass lit up and driver didn’t. I took a couple alligator clips to the leads on the LED and tapped direct to the battery and the cheapo lit up no prob. But when in the harness it does nothing.

Am I missing something? Do I need to have both (or all 4 for my stacked lights) plugged in for them to work?

Thanks in advance.

 

[dadbodsquarebod]

Forgot to mention in case it’s important

This is on an 87 K5 blazer

 

[TotalyHucked]

You may need to de-pin the Amazon bulbs and re-pin them correctly. It's not uncommon for them to be wrong/backwards. Or you may need a conversion harness, I have that for my RMS Lighting kit, can't remember if it's on the lows or highs though

 

[Scott91370]

Or they may need a relay to supply more power/amperage. But they should have at least come on dim.

 

[YakkoWarner]

LEDs are usualy off or go, unless they are specifically dimmable (and those don't count as "cheap"). Could check the voltage at the connector, if its low that could keep them from coming on. Polarity is also important, normal bulbs don't care which side is + or - but LEDs absolutely do (unless the kit specifcially includes circuitry to handle either polarity, again usually costs more).

 

[CountKrunk]

If you want some good LED light rms lighting has plug n play headlights for old card and trucks.

That's what i have. They work great and installed ez pz.

 

[Ricko1966]

#5 @YakkoWarner I'm betting that the polarity is backwards. As @YakkoWarner stated LEDs are polarity sensitive if you apply positive to the negative side and negative to the positive side,they will not light

 

[dadbodsquarebod]

Solved! @TotalyHucked @YakkoWarner @Ricko1966 were right. De-pinned the bulbs and swapped the polarity & they lit right up.

They look stupid as hell but at least the mystery is solved

Thank you all for the input.