Melted wire harness

[DO82]

So I’ve been having issues with my fogs after converting to LED’s. I found that my harness has melted. Stocks are 55w, the LED’s are 60w. Will 5w really make that much of a difference to melt it? Will this happen again when I get a new harness?


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[djevox]

There’s a lot of factors that go into that: true amp draw, wire sizes, connector quality, power/ground quality, ambient temps in that area.

P=IV is the equation to figure out what amp draw you should have. So with the info you provided, that would be 60/12 = 5A expected draw for one led unit.

 

[tsbbartholomew1]

So I’ve been having issues with my fogs after converting to LED’s. I found that my harness has melted. Stocks are 55w, the LED’s are 60w. Will 5w really make that much of a difference to melt it? Will this happen again when I get a new harness?


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If I had to guess something more went into the demise of the wiring harness than the addition of 1 amp from the new LED bulbs. Actually a 60 watt equivalent LED is going to pull less than the original bulbs IMHO. I would check for a short or grounding issues.

 

[DO82]

If I had to guess something more went into the demise of the wiring harness than the addition of 1 amp from the new LED bulbs. Actually a 60 watt equivalent LED is going to pull less than the original bulbs IMHO. I would check for a short or grounding issues.

This is exactly what I thought. I removed the canbus to see what happens. I’ll deal with the hyper flash which is barley noticeable for week and see how it pans out. My original issue was the fogs would randomly work here and there after the LED’s. Hope it was just bad canbus harnesses. I did cheap out on those. Thanks.


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[MannyN]

There’s a lot of factors that go into that: true amp draw, wire sizes, connector quality, power/ground quality, ambient temps in that area.

P=IV is the equation to figure out what amp draw you should have. So with the info you provided, that would be 60/12 = 5A expected draw for one led unit.

LED's will never draw that much. A 60W LED will draw maybe 1.2 A. LED's work with forward current on max. 3.6 Volts.

 

[tsbbartholomew1]

LED's will never draw that much. A 60W LED will draw maybe 1.2 A. LED's work with forward current on max. 3.6 Volts.

My thoughts also...

 

[djevox]

LED's will never draw that much. A 60W LED will draw maybe 1.2 A. LED's work with forward current on max. 3.6 Volts.

I disagree depending on application. What I posted is simple science, it is what it is. However, if the LEDs do operate on reduced voltage then that will change the formula like you mentioned. I have to assume 12 V if not enough information is provided.

 

[tsbbartholomew1]

But the LED’s are 60watt equivalents…notnpulling 60 watts like a normal bulb would be


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[ferraiolo1]

Are you using cheap Chinese units?


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[Richard320]

So I’ve been having issues with my fogs after converting to LED’s. I found that my harness has melted. Stocks are 55w, the LED’s are 60w. Will 5w really make that much of a difference to melt it? Will this happen again when I get a new harness?


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No and maybe. For me, enough juice to melt a harness points to a short to ground. Do the new bulbs fit right? Were there any modifications? Is there a big ceramic resistor to drop the voltage that gets really hot? Any wires get pinched when reassembling things?

 

[DO82]

No and maybe. For me, enough juice to melt a harness points to a short to ground. Do the new bulbs fit right? Were there any modifications? Is there a big ceramic resistor to drop the voltage that gets really hot? Any wires get pinched when reassembling things?

No all is well with the lights and they fit right. I have them as highs lows and fogs. No issues with the highs and lows


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[DO82]

Are you using cheap Chinese units?


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Yes, the canbus harness I went cheap on. I’ll get new ones.


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[djevox]

Right, so one of the three numbers input into the equation changes depending on what characteristics the LED has, and you get a different result.

 

[DO82]

All good, it was the cheap anti flicker harness I put in. You get what you pay for.


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