How To Install a LED Headlight Set and Heavy-Duty Headlight Harness - Kevin Tetz With LMC Truck

This video leads you through the step-by-step installation of 7" round headlights plus heavy-duty headlight wiring harness from LMC Truck. This DIY headlight and wiring project is a great upgrade that takes just a couple hours of time with basic tools, and it can be done even more quickly if you’re just changing the LED headlights alone.
Dim and yellowed headlights make your truck look aged, and they can be a safety issue, both with outward visibility at night and with other vehicles seeing you on the road. An LED Headlight Set from LMC Truck is an easy upgrade to increase the brightness and longevity of your truck or SUV headlights with less of a draw on your truck’s electrical system than factory lights. The addition of a plug-and-play Heavy-Duty Headlight Wiring Harness allows you to tap directly into your battery for 12V power, and won’t require any cutting, splicing, or soldering.
Kevin Tetz shows you all the basics you’ll need to get through the installation process, as well as some great tips and tricks to make sure you don’t run into any issues down the road. This how-to guide is performed with a Chevy C10, but it should help with similar headlight and wiring installations on other Chevy, GMC, Ford, and Dodge trucks with minor adjustments.
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About LMC Truck:
We offer parts and accessories for Chevy, Dodge and Ford trucks and SUVS. We are automotive specialists with over 30 years experience in helping you, the enthusiast, restore or maintain your pride and joy. We stock huge amounts of inventory and deliver right to your door so you can "keep 'em on the road!"
Needing some truck parts? Visit us online www.lmctruck.com
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[@utahyork3338]

I know this is an older video, but I'm just getting around to rewiring my truck. This wiring harness is top quality and easy to install. Thanks for the help Kevin.

[@bigblockss454ndn]

Real truck,real mechanic, real parts, reusing what you got to keep it on the road and no commercial break and it's done like other shows.... exactly the kind stuff I want to see when I'm wrenching on my truck....Thanks LMC😆

[@MLFranklin]

I always enjoy these. Kevin does such a great job explaining and showing things.

[@kermitefrog64]

I like the wide variety of products that are available on LMC for upgrading and restoring on my 1964 Ford f250.

[@zlone7wolfz]

“I like the way they look right here, alittle more professional” proceeds to place relays next to duct-taped coolant overflow tank

[@MrFescue]

Good video. Excellent way to improve safety of ride with improved front lighting.

[@bennieeubanks6055]

Nice video! The new lighting looks good.

[@richardadams1337]

Good lord! If you are going to fix your positive wire problem at the battery why would you not cut the frayed and oxidized end off the line and start with a complete and clean section of wire? Heck you could even go so far as to solder the wire to the positive battery terminal connector. Better connections mean less resistance and more power being distributed as intended. Oh! Would it kill ya to use some of that dielectric gel on your connectors? All in all though, very good instructional video. Thank you for the work you do.

[@EricFixalot]

I agree, that wasn't much of a repair. And considering it's instructional video, that was appalling. That increased resistance creates heat, so given enough load, you've got a fire on your hands.

[@burningbridgesthesilvershi2490]

i said the same thing out load while watching this lol

[@dorslv2342]

Ditto

[@TheSteelArmadillo]

I hope he lost some sleep over that. Appalling.

[@joeschlotthauer840]

I agree, but where do you stop, looked like the fan shroud was held on with zip ties...

[@tonyp8217]

FYI… the ground from the original driver side headlight harness needs to be reattached along with the new harness ground or the turn signals won’t work… ask me how I know… lol. Very informative video. Thanks Kevin and LMC

[@deankay4434]

Kevin, thanks for using the term “Bulkhead” as it is not a firewall. Plus, any electrical connector have multiple terminals. Male terminals are used on the device while the harness side is always female. Save a sample of different types from old electrical parts that are just thrown away. Use the terminal for pin fit just like using feeler gauges. Not so much a problem on a new harness but very helpful future old connector terminals on old harnesses during diagnosis. Also, always to eliminate oxidation or corrosion, even from moisture in the air, keep a tube of dielectric grease. How many times has someone fixed a malfunctioning bulb buy scuffing with a nylon pad to shine up and achieve a low resistant connection. It’s sold in the auto section of home improvement stores or boat dealers that use large tubes that are way cheaper by the oz. than a parts store. Thanks for the interesting instructional video! ASE Master Tech since 1978 - Retired

[@JP-xg8cd]

See saying please works all the time!

[@robertemmons2260]

Take it from me, you'll want to use some dielectric grease on those new leads that tie in to your battery. Even with a proper cleaning and tight installation mine had corroded after time. Several years ago I did the headlamp wiring harness upgrade from LMC truck. Using that harness and a set of new H6024 halogen bulbs ('68 C10) had really improved my night vision for driving. I'll eventually upgrade to the LED headlamps, but until then I'll burn my halogens until one burns out.

[@Capt_Killingfield]

Now this is my idea of fun weekend project. Minimum amount of effort, yet such a big difference. What a change to the night driving experience! This will be my next project after i get my doors re-pinned and re-aligned. Until then, I'll just work vicariously thru Kevin. Great vid! I enjoyed it. Do you have an exclusive LMC 'ground-up' build video? I'd buy it :)

[@Lmctruck1]

We don't have a full ground up video yet. We had a truck featured on the last season of Chop, Cut, Rebuild on MAVTV, which was pretty close to a full ground up build film.

[@missinlinkz4u]

Saved me $300 dollar, I was about to pay a mechanic to fix my 87 Chevy van

[@nickolaslitterick24]

keep up the great work

[@gabrielsandoval4994]

I like the original look. If they could make the bulb look like the classic but with the better lighting, then I’d do it.

[@zanehere3494]

😆😆😆💀

[@adriantomlin2902]

Gabriel Sandoval Buy a set if halogen sealed beans dude. Got em on my 71 Nova and they're plenty bright. Bright enough at night for more bugs to splat on my car and near misses with deer!!! Lol!!

[@clouseau3779]

The problem is with LMC, for what I've experienced, is that when I asked for advice on the fittest harness for my 1976 K20 OEM restoration, they answered that they couldn't fully do that since they are not "licensed mechanics or technicians ". As you can imagine, when you buy parts from Europe, you think twice before throwing money out of the window for unusable spares and shipping. Furthermore, we don't have too many US cars here and, consequently, there are almost no mechanics to ask.

[@dibekuluhawaze1880]

" C'mon... please 🥺....there we go 😕" that just how I feel when I'm unscrewing a bolt on my car.

[@randomthingsasmr4063]

Dayum I love these years trucks!

[@dinosorbara9424]

Were the original connections and wires to the lights removed or were they just tied up and hidden?

[@JuicyMullet801]

This the guy from the auto zone videos

[@arthurprado3818]

Nice save Kevin 👍🏾, slick with that ground cable 😅 FYI anyone with an XJ aka Cherokee. This harness will work and it’s what I’m about to order for both my XJ’s as well as some nice new LED headlights.

[@A3203503]

What was the orange light in the wheel well at the end? Also would have been good to know the voltage difference at the 12v headlight wiring before and after the upgrade. Placing those red wire terminals between the clamp on the battery reduces the pressure it can exert on the positive wire, plus cut that wire and clean it that way.

[@wesleyhudnall3353]

I saw that as well. Not sure what it was.

[@isaaccarranza1039]

I had that problem when i would drive at night I couldn’t see far because the headlights were not bright enough

[@youngn9na92]

I don't understand how the headlight switch or dimmer switch works with this system. How do you control the headlights, and dim the lights while you're driving?

[@blaincockrum712]

That's what I was wondering

[@dorslv2342]

just ordered one for my old technology 1979 Dodge Power Wagon

[@umangu]

The background music at the beginning is exactly like CJ Pony Parts. What a coincidence!

[@billskalicky5400]

The music sounds like the end of a Beavis and Butt-Head cartoon.

[@johnschaapman3149]

Hi Kevin my 64 Chevy c10 headlight wiring has a 2 wire plug the hd harness has 3 wire plug can you advise me on this

[@Dirka_n_Raszaron]

I’m dealing with this right now! What connects to the blue wire with white stripe? Can I use this as a 12v ign source?

[@CarlosAguilar-xg1vy]

Si son buenas las enseñanzas q' proponen, se podrá hacer pedidos desde México.

[@ermac9647]

Hooked up to my 78 ford f150 it worked but now I only have low beam lights my dimmer swich which usually kicks on my high beam now just turns lights on and off..any suggestions

[@rogerpotempo]

lmao, did you guys see all the light comming from the fender well? dont tell me all that light is comming from those new bulbs, omg I rechecked the video, it sure looks like it!

[@TreadTalk247]

Would be really nice if someone made replacement light housings for classic cars w 10-11 inch round lights! I’ve been looking for an additional set of original housings for our 1927 Buick Standard to take a part of modify to house a 7 inch round clear reflector inside along w a switchback led running light/turn signal inside!!! I don’t want to modify my originals lights but a replacement set I would!!

[@reidlarsen3516]

Great video ...right up to the point where you kept those horrible battery cable repair clamps. Those are the worst for getting corrosion. If your doing an electrical job the first thing you gotta do is get a good battery cable connections. Nothing is gonna work for long if you keep those things. Crimped or soldered and sealed up well to prevent acid vapors from attacking the copper. Repair clamps are for emergency use to get you home to make a real repair.

[@leonardochairez5528]

Exelente trabajo... Gracias x su gran ayuda. Cd Juárez Chihuahua Mx

[@Capt_Killingfield]

Installed in an hour. I had to borrow a cordless driver to drill holes for the ground. Unfortunately the ground wires are too short to attach to the factory ground bolts. My headlights are now as bright as a modern vehicle's. Too easy!!

[@mplante7352]

Nice how to, however as an observation the connections that were cleaned up at the battery looked nasty. It wouldn't have taken too much longer to replace the battery cables and terminals in a truck like that. Bad grounds and power sources can cause all kinds of problems to related systems.

[@workingmansrestorations7071]

Good stuff. I need to work on my 84 k5 tail lights... I want to replace the entire rear section

[@Lmctruck1]

Let us help you with a link for that sir. www.lmctruck.com/icatalog/cc/full.aspx?Page=197

[@cristiancarrillo2625]

I installed the dual headlight harness on my 65 GMC 1/2 ton. It drained my battery and did not work with the headlight switch. Anyone else have issues installing?

[@DaRealArtist]

Question On a 1964-1966 C10, after routing the head lights harness past the drivers side inner fender well, exactly where does the wiring pass through on the radiator support core?

[@Ibarrajr1]

What about connection to light switch?

[@FordManiac76]

Why not cut and re strip those snaggly main positive battery wires. Much better connection for starter

[@jedclampett6466]

Those replacement battery cable ends are the worst of the worst.

[@poolman8676]

great video by the way. Can I use the original wiring harness with these aftermarket LED lights? I also want to take advantage of the ones that have the built-in turn signals that are absolutely terrible

[@dalejohnson9342]

No one does any work on the Suburbans. Why? I am planning to exchange my Halogen lights with LEDs. I also am planning a compete rewire of my 78 Suburban and have no idea where the wire loom goes along or in the body to the rear of the vehicle. NO one gives any information on this little issue.

[@danielesquivel5938]

Can you tie in the turn signals to this. My old turn signals suck.

[@xman577]

I wonder if I can adapt this kit to work on my 1971 Chevelle

[@paultribbett7765]

do you leave the old headlight plugs remain in the truck?

[@scottmathsonproductions]

Question: with the upgraded halogen and led halo ring, is the heavy duty harness required or can you just use that pig-tail converter?

[@danmeade3059]

where is the fuse?

[@Normanthegerman]

Thank you Sir, nice Job!!!! I am from Germany and maybe i need to bought some parts. Is this posible?

[@nighthawk4045]

Do the halogen conversion bulb sets come with the plug n play pigtail or is that sold separately?

[@wearemannamachine]

How many of your people have actually purchased the kit he's pimping here? Well, I did. Total JUNK!!! Made my situation worse because the parts are inferior. Lately I've had a few issues with LMC. Headlight buckets are another thing I had problems with. The hole where the spring connects is wide open with no way to actually hold onto the bucket. Beware on this kit.

[@miguelangelvalderrama1808]

Old technology can break the concrete 🤭🤭🤭🤭 but not to itself.

[@707SonomaComa]

I am looking for a complete Headlight Assembly for my Two-Headlight system on a 1969 Chevy C-20 Pickup. A kit that includes the Headlamp Housing, Headlamp Bucket, Headlamp Trim Ring and all necessary Headlight Adjusting Hardware Do you have anything for the 1969 Chevy C-20?

[@Fritsvrolijk]

Hello is 7 inch good for the GMC Sierra from the year 1971

[@thehomiejuan1306]

Are there LED headlights available for 77 Dodge Royal Monaco

[@drummercarson896]

Does this installation work with the 78 Chevy Squarebody?

[@Lmctruck1]

Yes, it sure does.

[@TheMauser98a]

I have a 1987 chevy stepside , when I turn on the light , all lights except the headlight come on, i ordered the heavy-duty upgrade headlight harness hope that fixes the head light issue. MAUSER

[@renenunez3404]

What's the part number for the pigtail harness for the same truck? Thanks

[@christophergreen2328]

Would this be basically the same deal for a 82 c10, truck has a 90 suburban front end.

[@pattersonlandscaping5621]

can u convert to led without any other changes/add ons?

[@eddamonsta4887]

Hey lmc truck how about the hi performance halogen headlights that lmc truck sells on there catalog are they a white light and not the yellowish.

[@freddygonzalez5809]

My 1990 GMC Suburban R1500 has different plugs any advice on how to connect the LMC HD Harness to my Burban? Thank you

[@Lmctruck1]

Hello, we offer a harness for a 1990 Suburban. Check it out our website.

[@jamestodd1038]

With led lighting will they melt snow and ice? It said it doesn’t burn as hot. Thanks

[@Lmctruck1]

Hello, this depends on how cold it is and how long the LED's have been on. Given enough time they could melt snow.

[@mandalortheslayer]

This does not just plug in the old wires on an 89 c2500 like they say.🙄

[@haydenreyes4621]

It fits 89 c20 not 2500 different truck

[@reyluque7430]

hi I have a 72 F350 would you have headlight upgrade for me

[@Coronet_shop]

Rey Luque look at us both 72's a F100 and F350 👍 lol

[@rayguerrero3321]

@@QSAUnited with all led lighting does your blinker indicator work in the dash? Because I'm looking to do this as well on my truck "Big Booty Judy". I'm asking because some people said it dosent build up enough resistance for the signal to indicate??

[@kyleh3615]

Hit up LMCs website and request a catalog But isn't it just a standard 7" light Because you should be able to Google that and find plenty I did for my 77 f150

[@itjustdusty2621]

Do first gen dodge videos

[@zeuszivonencia3068]

would that work for a 70 Chevelle :o

[@adamm.8606]

Would I still be able to switch between high and low beams with this system?

[@Lmctruck1]

Yes, high and low beams maintain their functionality with this system.

[@wesleyparker2767]

I want some led headlights for my f100. Can i get some from LMC truck and just pull the originals And put the aftermarkets in without adding anything. Just unplug and plug?

[@fatesangel8875]

Headlights yes, if you upgrade to led parking lamps and other lights you need a flasher that works with LED technology so it doesn't hyperblink.

[@paultribbett7765]

with the new harness ,,does the dimmer button still work ?

[@Lmctruck1]

Hi Paul, the dimmer button would maintain functionality with these parts.

[@marcol7847]

Did you connect the relay wires to the negative or positive terminal ?

[@billdonoho3905]

Have watched several of these videos and if is about electricity you it seems you connect everything back to the battery? New radio, Air conditioning, head lights, power windows, and so on!!!!! If I upgrade all of those components in my truck and run everything back to the battery I will have several wires running to the batter and no place to attach the battery terminal! (joking) But there has to be a better way to attach everything directly to the Battery, any suggestion's?

[@MegaMino92]

Upgrade to a junction block. Like 8 post would be just fine.

[@chrism7574]

Not everything needs to be connected to the battery terminal, remember. If you feel confident enough to solder and heat shrink, you can easily solder additional wires in parallel to the wire already connected to the battery terminal. Be careful not to exceed you’re battery’s current limit though, or else your car won’t be able to start up if all those electrical systems are drawing current.

[@Bulldog187th]

I bought the 36-0299 headlight from you guys and the 36-3580 wiring harness that you just used. I did everything that you did. But I have a problem. my low beams are dimmer now than the stock low beams. WHY? The hi beams work awesome!!

[@Lmctruck1]

Please give our customer service team a call so we may discuss further.

[@Bulldog187th]

I called yesterday and they said someone would call me back today , never happened , I'll cal again

[@Lmctruck1]

Feel free to send us an email with your order number so we can check on this for you. Quality control can take up to 48 business hours to review information and advise.

[@adrianvalenzuela1824]

On the new headlight harnes what does each wire do just in case i have to cut the end of the wire

[@Lmctruck1]

Hey Adrian! Feel free to give us a call at 1-800-562-8782 or email [e-mail] and we'll try to get an answer for you!

[@garypalmer5533]

do you have these for a 84 s10?

[@vincemajestyk9497]

Glass is best, polycarbonate sucks. Ever see any of these new cars after a few years outside? Nice install but I wouldn't rely on Chinese wiring or relays for my headlights. You'll regret it once you get stranded on a back road with no lights. It will happen. Those relays are notoriously cheap and the wiring is thin gauge. Stay with OE wattage values if you use them.

[@rockyp544]

What is it with dirt dobbers and wasps in the c10s?? I had a city under the dash

[@chuckyrides]

Rocky P same here in my 79

[@eddamonsta4887]

Hi my lights be blinking while I drive my truck after few a mints of driving

[@taetherton]

Bad ground somewhere.

[@chrism7574]

White lights on an old truck just don’t look good, in my opinion. I’d keep the yellow.

[@Squarebody_Builds]

Good to see you use that wire brush to clean those 3 corroded strands on that battery cable... 🙄🙄🙄

[@elixruiz8440]

Kevin, usually I just watch the videos with a grain of salt to get the idea and all the things that might go wrong. You are a professional but don't show it in your work. all that rust under the battery tray was probably from acid leaking, the holes in the bottom of the radiator support and the battery tray should have been neutralised, cleaned up and painted. The wires to the battery should have been at least checked for flexibility due to the burn mark on the positive cable and those battery clamps were shameful. That's like wearing a new suit with yesterday's underwear. Please try and use that TV magic or get a little help from your sponsor. I get help from Spell check all the time, there's no shame in asking. keep up the good work.

[@wrenchmanhotrods1247]

Can't believe you used those old nasty wire ends , should have cut them off and removed the insolation and then installed them .

[@SupaNautica]

Question: I have a 1948 Dodge B1B Panel, not sure what size the headlights are? Check my channel, you will see the body swap videos, I'm sure it's a 7 inch headlight but not 100%.

[@aviinc6476]

Sorry but I give about 2yrs B4 you have a connection problem

[@21Piloteer]

Sheesh...get the owner some new battery cables.

[@adriantomlin2902]

Nathan Breece No doubt!! Fancy ass lights with crappy battery cables!!

[@Yousitech]

Techtickle information😂

[@l.m.1454]

Cut the wires back at the battery my man…

[@patkelley2190]

Nice stuff but way over priced.

[@Maleekus]

12:31 longer than I would work on a Chevy...

[@sinformant]

I agree.I've spent much more time working on my fords than my Chevy's 😉 BTW just a friendly jab

[@Tigerfire75]

LED lights are bad for people's eyes.

[@georgebunce749]

So much cringe, so little time.

[@waltlars3687]

do you have the square head light LED replacement for a 81 F250 ?

[@Lmctruck1]

Not at this time. We are always looking to add new products. Have you signed up for our emails? New products are prominently featured there. If you're not signed up for the emails, you can say you would like to receive emails when you request a free parts catalog. goo.gl/F2reuf

[@waltlars3687]

Google removed the link for vololateing TOS

[@Lmctruck1]

Walt Lars We'll try again. www.lmctruck.com/scripts/mgrqispi.dll?APPNAME=WebLmc&PRGNAME=CatalogRequest&ARGUMENTS=-ATK,-AFD&Make=FD

[@waltlars3687]

Yep that one worked