LS Standalone Harness 101 Beginners Guide | HOW TO Wire a LS Swap Hotrod Engine

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Күн бұрын

This time on SPPTV I do my best to pass on the knowledge I have gained through the years building over 20 stand alone LS wiring harnesses. I am no professional and you should do your own research before jumping into a project like this, but I have never had any problems.
Re-Wiring a stock GM truck wiring harness is intimidating if you are new to this kind of thing, but it is relatively simple if you follow some steps. The best advice I can give is to do things in sections. Focus on one part of the wiring harness at a time and then tape it up, put it to the side, etc. .
In this video I show how you can convert a factory Silverado wiring harness to be used in a LS swap vehicle of any type. I cover the pcm connectors and de pinning. Removing connectors and un-needed wires. Power wires and which wires to connect to outside sources, and more.
Check out my video I made on HP Tuners
• HP Tuners 101 Beginner...
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Пікірлер: 206

@bishop5166 5 жыл бұрын

This might be the best detailed hands on harness set up ever. I'll be saving this video and using it as a step by step reference. Thanks.

@chevycaprice8956 5 жыл бұрын

You should check out lt1 swap he is a master at this

@SPPTVarmy 5 жыл бұрын

I learned a lot in the begining from him. - Mike

@sethhill19791979 4 жыл бұрын

its a keeper

@travis3688 4 жыл бұрын

Will this work for a blu/green harness to a red green ecu?

@SPPTVarmy 3 жыл бұрын

We dont do it for other people, sorry.

@ThatGuyFromArizona 5 жыл бұрын

Well done Mike. Harnesses were always a challenging and fun project when I built cars.

@hillbillygarage1270 3 жыл бұрын

A lot of good info here. Definitely seems less daunting than I imagined. May have to give this a shot for my dad's 1938 Ford Coupe ls swap.

@tinman9341 4 жыл бұрын

Great work guys!!!! I’ve been doing some research for a future project and this is extremely helpful!!! Keep up the great work!👍🏼👍🏼👍🏼

@fstarockaburns425 3 жыл бұрын

bro you answered just about ALL my (newb) LS harness questions in less than 1 minute AND you mobo jumboed! Excellent! My 1st move to fi and last thing i wanna do it leave junkyard and be like, oh dang - i should have grabbed this/that - THANKS!! i wanna do a dirt cheap stock ecu (re programmed) 5.3 with 706 heads and a cam spring upgrade - which I WILL vlog cos i wanna do 350, 383 then LS comparison! my 350 is already FAST (it really is) but of course that wears off quick- my buddy got a 550 crate and i wanna whip him with a junkyard build haha

@baggedmazda666 5 жыл бұрын

Best thing I have found to removing the plastic loom and tape is a sewing stitch cutter. I’m tackling wiring on my first swap in the next few upcoming weeks hopefully it goes smoothly. It’s not a ls but thankfully I am doubling the power over stock and gaining fuel injection

@angiesmith9196 4 жыл бұрын

Lovin the pink ls in the background at the beginning of the video

@emperor417 4 жыл бұрын

Not doing anything ls related but I found the video very informative thank u 👨🏽‍🔧👍🏽

@raj9223 5 жыл бұрын

Great video man, makes me feel alot more confident in my new harness !!!

@adee4370 4 жыл бұрын

Great job man! My favorite parts were sharpnicity and the imaginary firewall. (:

@sanfordrhudy774 5 жыл бұрын

Wish I had your knowledge... you make this look so easy. Killer skills man!

@illduitmyself 4 жыл бұрын

takes time to learn. start yesterday

@wyattvanwart4398 Жыл бұрын

This was actually very helpful, thank you. Here I am under the dash trying to take apart the harness wondering if I actually need anything that goes past the firewall. It's my first time doing an engine swap, and I'm actually really surprised at how smoothly everything's going. Bolts aren't seized, clips aren't breaking, I haven't bashed my hands or fingers, seals aren't tearing, I keep expecting something to happen and it doesn't.

@rustyjunk9008 3 жыл бұрын

GREAT vid! Kind of makes me second guess not grabbing harness and ecu when i pulled my motor planning to run Microsquirt. 👍

@tyrannosaurusmex5033 4 жыл бұрын

Awesome job I am going to tackle this job on my ls swap stang thanks for the info

@Hysjulien69 7 ай бұрын

Subbed! Awesome video. I was scared of doing this, now I'm confident I can tackle er! I'll use the saved money on go fast parts

@jspriver Жыл бұрын

This video plus the ls1swap site will save me a grand easy. Thanks

@torrypope3218 3 жыл бұрын

Gonna dive in for my LS swap into my 90 Chevy short van.I did a harness for a Subbie EJ swap into a 87 GL so I know a bit about it.

@juancarlosmercado4209 Жыл бұрын

The video section starting at 20:54 was the best, but camera work too shaky and quick. I replayed it and got the information I was looking for. Like color of wires and quantity of wires. I am new to this. Bought an unfinished LS swap with the engine running, but I want to double check the wire work and make sure all the gauges work. The old gauges are non-op and I am installing a new digital-electronic set up. Feeling overwhelmed but very motivated! Good work on the video and thank you!

@paulmarks8401 Жыл бұрын

!!! Wow thks again for sharin this will help me put this Harness in 1947 Dodge 3 ton water truck with 6.Litre and 4x4 as well Awesome IMFO Can,t waitto get it goin keep ya Posted Keep it up Ya Got this Thks

@teamreid1 5 жыл бұрын

Great video, I too use that same site for the harness that I do. Great source for doing a harness like this. So you boys enjoy Alberta Premium Whiskey with Mountain Dew eh? That's great guys

@small_engine_co 3 жыл бұрын

I watch this video anytime I do a harness

@hangooksaram123 4 жыл бұрын

Super clear and well explained. Thank you!

@rajcam80 5 жыл бұрын

Keep up the great info videos, They are very helpful. I also have the HP tuner pro.

@ronringel9132 5 жыл бұрын

Well done Mike... thanks for sharing.

@kingjoe750 4 жыл бұрын

Just took my harness off, bountvto break it down. First time try this, will keep you updated.

@chevyman217 4 жыл бұрын

Same lol

@kingjoe750 4 жыл бұрын

@@chevyman217 this harness is crazy. I done with the easy part. Now I'm on to the hard part smh

@timwickersham869 5 жыл бұрын

Very nice job man...made that look so easy,,,,..🤘

@boostin3156 5 жыл бұрын

Swapping a 5.3 out of a Tahoe into my 2004 Subaru wrx, this really helped alot!

@anthonycosco7660 4 жыл бұрын

I wanna do this to my Impreza? Did you use the stock subframe?

@lucysmith4242 4 жыл бұрын

did you finish the swap yet?

@bigsrg1 4 жыл бұрын

Awesome explanation/tutorial and resources! Thanx!

@moralwarfare 2 жыл бұрын

I appreciate your approach, great work

@Sloppyjalopy123 5 жыл бұрын

Great job bro, jam packed full of quality info.

@brandonpeters6379 5 жыл бұрын

Good ass info guys. Dont stop. Cheers from the south

@lugisland 3 жыл бұрын

Great video. I just discovered your channel, good content 👍

@sethhill19791979 4 жыл бұрын

thanks man, lots of info. nice work. keep it up.

@robsjoholm6523 2 жыл бұрын

Great job and appreciate all the details.

@tjeffjenkins6226 5 жыл бұрын

Great job Mike!

@robertironside3166 4 жыл бұрын

It all sounded fantastic right up to the point where you have the haul out the multi meter and trace all the power wires that all look the same... it was then I realized I was trapped in a nightmare :-)

@arkansastrey9694 3 жыл бұрын

The struggle is real

@jaga7484 3 жыл бұрын

Very valuable information thank you for your time.

@joebhall5439 4 жыл бұрын

Thank you for being awesome and sharing.

@Marcelo69Yenko 5 жыл бұрын

Very nice!!!! Congratulations and thanks!!!!

@SchneiderClassics 2 жыл бұрын

thank you glad to know. about to start an ls swap for my 67

@frankguerra3314 2 жыл бұрын

Ty I needed to know everything like that.im putting a 5.3 in my 03 dodge Dakota..

@krisyaz1545 5 жыл бұрын

Great video.. Very helpful.

@foghornleghorn8536 5 жыл бұрын

Thanks for the effort you put in to create the video.

@PLAYER200010 2 жыл бұрын

Awesome video thanks buddy

@arianherrett1438 Жыл бұрын

Awesome video thank you!

@billmitchelljr6303 5 жыл бұрын

Mike you must be a very patient guy. 🤣🤣🤣

@benoitsarrasin6889 3 жыл бұрын

Thanks for the info!

@adamdubeau8038 3 жыл бұрын

Hey Mike, did you ever do a follow up video where you wired up the ends that you cut off from the harness, like the tach signal and wiring the fuse block?

@jackchrisman2414 4 жыл бұрын

Great video thanks

@LINDRLST 4 ай бұрын

Great video, lots of information. Had a question though. What did you do to change from using a MAF to speed density and why? Was this done via the PCM programing and is a stock pcm capable of being reflashed for this? Once again great video.

@1gglywggly580 4 жыл бұрын

are stock wiring harness good for any kinda weird mods i wana do to my engine?

@antwantucker885 4 жыл бұрын

I have a aftermarket wire harness with two ground wires which one has about 5v when I plugged up everything to the battery. Should it have two grounds and should both be grounded to the engine?

@shadetreerodder 4 жыл бұрын

Good stuff!

@arguingwithstupidpeople2047 3 жыл бұрын

This makes me so thankful for the simplicity, reliability, and roadside tuneability of my carbureted engine.

@torrypope3218 3 жыл бұрын

Fear of what you dont understand,i used to be the same but FI is very reliable and you can trouble shoot it with a simple code reader.

@arguingwithstupidpeople2047 3 жыл бұрын

@@torrypope3218 What I have discovered is that Millennial types fear and lack understanding of carburetors. What - you think I don't have EFI on my daily driver? But my carbureted car drives every bit as well and has proven MORE reliable with much simpler wiring and fewer sensors to malfunction.

@torrypope3218 3 жыл бұрын

@@arguingwithstupidpeople2047 Im 50 so i know my way around a carb,rebuilt,I dont know ,over a 100.Just saying thaere is an advantages over carb,such as tunability,better fuel mileage and less emissions.

@blairgautschi1453 2 жыл бұрын

I followed your video on rewiring my oem ls harness to integrate with the new holley terminator ecm that controls my high performance engine. My question is, will I have fault codes and reduced engine mode, and if so, what is the fix? Thanks man!

@Kacz101stABNDIV 5 жыл бұрын

I honestly find it easier to de pin entire harness and separate everything. Then plug each sensor in one at a time and adjust length. To wherever your ecu will be mounted. This way you can hide or tuck the harness super easily and it looks great when you are done, also prevents rats nest

@ericjswindle 4 жыл бұрын

Zipties for the win do you buy new pins for the ecu end and if so where do you get them?

@KurtisDenny Ай бұрын

I need to know if I can remove oil and coolant level without issue on a regular old Silverado not stand alone. Also which cruise control wires can I get rid of

@mainline929 3 жыл бұрын

I have an 05 LQ9 using Lt1 Swap info and have several wires that color does not match ? on Blue C1 connector pin #7/ circuit # 2705 it shows grey GRY color and my wire is Yellow ? still on Blue C1 pin #45 it shows GRY and my wire is Tan ? All other info so far applies but I am confused on what to do with those two wires. Thank you in advance for any help and you vid is the BEST !

@fuddwacker4803 2 жыл бұрын

When I am ready for it (haven’t obtained LS yet) what should you charge me to wire one up?

@1979gmcummmins 3 жыл бұрын

This video is pure gold. Question is what do you do with your computer when you've made a stand alone harness?

@dirtypulloutsgamechannel4911 3 жыл бұрын

Can I cut all the wires out going to the DBW plug I’m also doing DBC swap and need to know before cutting? Thanks in Advance!!

@mecanikamatir8262 4 жыл бұрын

Hi guys, what if I don't pull out the old cable. Can I still start the engine?

@marianheaney9803 4 жыл бұрын

Best to use a dental pick to release the tab on connector pins. They can be fragile and you don't want to break any.

@hellik91 4 жыл бұрын

Thanks for the Vid! Can you de-pin all these and switch from a dbw pcm to a dbc one and it will work? Thanks :)

@albertocorpus5885 3 жыл бұрын

How’s it going I have a question, what would I be doing with pins 26 & 29 HO2S B1S1 low signal- off the blue connector.

@josephingles817 3 жыл бұрын

Would this idea work on doing a 97 chevy camaro with a 3800 w/5speed manual and converting it over to old school with a 305 carburetor set up

@MattLsBr 3 жыл бұрын

Can u use the green blue pcm 5.3 wire harness with dive by cable throttle body ?

@chadreynolds1304 4 жыл бұрын

Will this harness setup work with a 72 chevelle?

@bigbobdasloth 2 жыл бұрын

I know it's been a while since this video was uploaded but this guide does work with the red and blue harness as well?

@araporrada21 4 жыл бұрын

Thank you man !

@BayWop 4 жыл бұрын

Where are you getting the pink wires for the front o2 sensors to the new fuse block? The rear o2 only has pink wires ans they are required to be removed!

@chancecolwell3736 3 жыл бұрын

Do you need the fuse box for the ls to run

@punishingwithdabowtie9106 4 жыл бұрын

Hey whats up mike. I was wondering if you knew how to make a gen4 6.2l wire harness and how much?

@mikeverything4098 2 жыл бұрын

Do you know what color wire is connected to both the injectors and coil packs My swap cranks but no start seen on a forum some guy spliced into that wire with a 12v relay

@jorgemaldonado327 3 жыл бұрын

Good videos just subscribed to your videos have. Question can a 05 silverado harness work with a cable tb i found a harness in good condition for almost free thank you for any info

@franciscolara8359 7 ай бұрын

You guys know, if I can I put a 2011 5.3 Silverado harness in a 2008 tahoe 5.3 block and transmission with a 4L60E?

@simple_man_jkb 3 жыл бұрын

I learned a lot and feel more confident. But am still scared. Now how do you make what you just made plug into my 91 s10

@jasonhastings5538 8 ай бұрын

Mike How did you hook up obd port?

@ericthompson3477 4 жыл бұрын

Do you have to power each injector ?

@jimbob9218 3 жыл бұрын

Good video

@mschaffer2826 Жыл бұрын

Do you have a link to LT1 swap for the pinout guide?

@ericanders7551 2 жыл бұрын

My question is that I have a 6.0 and a 4l80. Can I go ahead and grab an ECU from a junkyard out of a truck or van with a 6.0 and 4l80?

@johnpaulgarrido1496 5 жыл бұрын

Thank u for ur video but it really complicated there a lot of people that are not running ur setup I'm really confused because there a lot of wire u cut off that I have no idea what they look like

@rand4561 3 жыл бұрын

Hey man what about the fuel pump harness?

@andrewcaldwell4836 2 жыл бұрын

How much do you charge to make a 5.3 wiring harness for 1991 chevy caprice classic I have a 5.3 wires harness and pcm and fuse box ??

@MuscleCarMike 5 жыл бұрын

I have a 79 Trans am im thinking of ls swapping

@JamesSmith-yd1fd 4 жыл бұрын

How about where your scan tool plugs up

@juliobriseno7721 Жыл бұрын

Question on the drive by wire if removing can i still use throttle body cable driven with the 2003 2005 ecm . Thank you so much!!

@SPPTVarmy Жыл бұрын

I believe it depends on the individual ecm if they have the option. Closer to 2003 the better as it's more likely to be capable of both. If you found an ECM at a Junkyard you may be able to google the part number and find out forsure.

@MrBeezweeky 5 жыл бұрын

Nice!

@jackperry9369 2 жыл бұрын

Thanks sir appreciate it was good to c this ill have to pound this into my marble lol 😆

@mikeyhue2437 3 жыл бұрын

26 of Albert prime on the table lol 🤙

@kevinwest3689 4 жыл бұрын

Dang I wish I was building a sonic Stang, I still don't know what I can cut or shouldn't for my application. The hardest part about the swap is finding a video of someone that knows what they're doing that's doing the same thing you are. 🥴

@chriscase6341 3 жыл бұрын

Thanks alot

@texasstarauto4542 2 жыл бұрын

On the o2 sensors the rears on the hp tuner is it just turning them off or is there more to deleting them

@SPPTVarmy 2 жыл бұрын

It's basically just setting the ECM to ignore the code by changing the "Check Engine Light". You can tell the ECM to not watch for that error or report it.

@songokux4 4 жыл бұрын

That first time seeing it gave me an anxiety attack but you explained well

@rossrockey4803 4 жыл бұрын

So, I still have this giant wiring harness laying over the top of my motor. Does each injector really need its own pink wire running all the way from the fuseblock? Any reason we can't splice them all together at the back of the manifold and run one slightly larger wire over to the fuse block?

@theredfishkid 4 жыл бұрын

Ross Rockey kzfaq.info/get/bejne/b8ePZtqCrcnRj40.html

@mdamron115 4 жыл бұрын

How does hooking up a different trans work, how does the ecu know when to shift etc

@bradywilliams2666 4 жыл бұрын

He said he's using a powerglide trans. Which is non comp. controlled.

@dlawson8993 4 жыл бұрын

If you're using a th400 and plan on using a 4l80 later do you leave the transmission wires in the harness? Also will the computer work the way it should if you do?

@mikejackson4538 Жыл бұрын

You can leave the trans wires but you have to delete it from pcm, if you ever go back to electric trans then have to have that added back to pcm

@Zone6G 5 жыл бұрын

Another great video. Do you need coolant temp to run speed density? Does the wideband have to be fed into the ecu? I sent my harness out, and don't have coolant temp in the harness anymore, and my wideband isn't wired into the harness.

@SPPTVarmy 5 жыл бұрын

Coolant temp is needed yes, for multiple functions of the ecm. Your wideband would be completely seperate.

@Zone6G 5 жыл бұрын

@@SPPTVarmy Thanks. The plug that was the coolant temp plug is labeled IAT, and I don't have a coolant temp. Now I have to tear into the harness I already paid for smh. Guess I'm back to checking pinouts.

@Zone6G 5 жыл бұрын

@@SPPTVarmy That video was so spot on. I'm donating next live stream. I checked my harness again. I did have coolant temp and IAT, just both with the same style plug. They both had continuity with their assigned pins.