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2004 trailer with LED lights

leboyd

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leboyd Enthusiast

leboyd

Posted
Posted

I broke one of my lights on my trailer and decided to upgrade to LED.

 

I'm getting great turn signals, but no running lights. I measured the volts at the trailer lights and it is lower than at the truck trailer connection. So I strung wires back to the trailer lights and got the same results. When I ohmn them I get 0.0.

 

I assume I'm making an error somewhere, but wanted to check on here to make sure the 04 can use the LED trailer lights. Do I need a resistor or something?

 

TIA

h2ofwlr Enthusiast

h2ofwlr

Posted
Posted

LED lights have less of an amp draw than standard lights (Eg energy saving), so it should be no problems at all. There should be no resistor or anything needed.

I would double check the instructions again as no idea the model or make of the lights and if any manufacturer quarks with them -- remember us guys do not reading instructions ;)

 

When I went to LED trailer lights, it was the best decision that I made regarding the trailer. As my experience these last 6 years using them they are much more reliable. BTW, I just hooked them and they worked as they should.

ManyCamaroz Enthusiast

ManyCamaroz

Posted
Posted

And also check for corroded wire splices and connections. Swapping to LED should not be the issue.

leboyd Enthusiast

leboyd

Posted
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Posted

Thanks for the tips. I do have blinkers, so I know I have a good ground. I'll try and look at it again this evening. I'm sure I just done something dumb.

'01LS1 Senior Enthusiast

'01LS1

Posted
Posted

Short sort of related story, though opposite of you. Have a 2003 class 8 Peterbilt & the flasher quit working one day. Stopped at the Pete dealer on the way home & picked one up.

The parts guy asked if I had many LED lights & I said no, not on the truck, but the trailer had a few. Handed it to me the flasher & was on my way.

 

A month later, one of the tail lights went out & replaced both with LED's. They would light up, but not flash or brighten with the brakes on. Called the parts guy & he told me

to come back & buy another flasher for LED's. The only difference is the new one has a ground wire coming directly off of it separate of the harness & everything works great now.

 

Not sure what component is under GM's dash, but would bet it is something similar. Do you have access to working standard lights for the trailer to make sure all functions work?

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