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H4 LED headlight wiring harness

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Old Dec 31, 2020 | 08:48 AM
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From: Arizona
H4 LED headlight wiring harness

I just installed LED headlights along with the relay harness and I'm concerned about water getting into the connector. Should I put dialectic grease in the gaps to protect it? Maybe I'm just being too cautious...not too sure about electrical stuff.

Another issue: There are gaps between the grill and corner lights. I'm missing 3 out of 4 of the little plastic inserts. Think that's the issue with the gap? Anyone know where to get these plastic inserts online?



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Old Dec 31, 2020 | 10:45 AM
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I, personally, use dielectric grease in every connector I assemble. IOW: I pull a plug wire, it gets a shot of grease before I put it back on.
I, myself, would give a little squirt of the stuff into both the front and back side of those headlight plugs. I do it to all plugs I work on. It reduces corrosion build-up, keeps the crud out, and makes it easier to slip them on/off.
Most of the factory plugs seem to have a seal of some sort on the back side. A rubber boot, a rubber insert, something like that. As long as that factory seal is still good, ie: still soft and have a good seal to the plug body, I leave them alone, and just give a squirt of grease into the front side of the plug. You don't need to do both halves of a plug assembly. Just a dab into the female side does the trick nicely.

All this just the way *I* , personally, do it. Maybe I over use the dielectric grease, but it's worked for me over the years. Very nicely, it's worked for me, so I'll stick to my policy of the way I use the grease.

Good luck!
Pat☺
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Old Dec 31, 2020 | 02:13 PM
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Thanks.
BTW, sorry about the fire in your truck!
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Old Dec 31, 2020 | 04:36 PM
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If you could not find the plastic inserts, Try big zip-ties where they go. I think they're just there to center the bulb and make it slide better for adjustment.
While I got may airbox, rad overflow tank, etc out for power steering gear box replacement, I WILL re-apply dielectric / bulb grease on connector pins, and seal the back side with drop of RTV silicone.
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Old Dec 31, 2020 | 04:46 PM
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Where did you get the headlights? Model, brand, price? Do they handle the power fluctuations from the alternator well? Do they blind other drivers on the low beams at all?

I've been thinking about upgrading mine on my 93 pickup. The standard halogen lights are fine, but since so many new cars on the road put out ridiculous amounts of light these days, I kind of have to up the brightness just to be able to see with oncoming traffic in my eyes.
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Old Dec 31, 2020 | 07:27 PM
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They look like the JW Speaker's with the proper lenses.
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Old Dec 31, 2020 | 08:02 PM
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Never mind. I figured it out. It appears to be one of the Chinese brands that is sold under 2 billion different marketing names.
Seems to get good reviews though and has a decent price.

Lights
Amazon Amazon

Relay Kit
Amazon Amazon

Last edited by ToyoDerp; Dec 31, 2020 at 08:36 PM.
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Old Jan 2, 2021 | 07:03 PM
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Originally Posted by ToyoDerp
Never mind. I figured it out. It appears to be one of the Chinese brands that is sold under 2 billion different marketing names.
Seems to get good reviews though and has a decent price.

Lights
https://www.amazon.com/gp/product/B07BWBRDJ5

Relay Kit
https://www.amazon.com/gp/product/B07B9QQMMH
Yes, the headlights are made in china. Also got the cheap $25 relay harness from Amazon. The lights have a nice cutoff and nobody has flashed me yet.
Huge improvement over the sealed beams.
Came with a 30 amp fuse but I put a 15 amp in there because I saw some reviews about the wire not measuring to spec. Works great so far.

I kinda wish I had went with the Hellas instead.

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Old Jan 2, 2021 | 08:27 PM
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The beam patterns look good on those. Good choice. BTW, I sealed the back of my Truck-Lites connector with RTV Silicone. Pins got fresh coat of silicone grease and I taped around the interface.

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Old Jan 3, 2021 | 11:37 AM
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That's what I'll do. ..RTV or silicone to protect the plug from water.
Still trying to figure out why I have a large gap between the grill and corner lights. Something seems off.
BTW, it was like this before I installed new headlights.

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Old Jan 3, 2021 | 03:46 PM
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The corner gaps are pretty common. Mine has been like that for 15 years. LOL

I think it's because the fasteners wear out over time and they pop out while driving. There's a good bit of tension pulling the corner pieces outward that can overcome the fasteners.
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