Ebay LS swap $99 wiring harness test and first engine start! Gen 3 drive by wire, how did it work?

$99 Ebay engine harness install and first fire up of my junkyard L33 right on an engine stand. In this video I show just how simple and easy it is to hook up this harness. This is my go to Ebay harness for the 2003-2007 gen3 drive by wire configuration, it worked so well in my 1951 Hudson build that I bought a bunch more for future builds.

[@jasonbarnes2636]

Best made it look easy to wire an LS

[@rust_hoarder_garage]

It is easy! I will be going over the hook up of the under dash wires including fuel pump wiring soon in the current 1956 Chevy truck build.

[@GrandPitoVic]

This just makes me way more excited to get my engine finished and order a harness. I'm going to start her on the stand. It's not hard apparently. Thank you sir.

[@rust_hoarder_garage]

Not hard at all, just make sure the stand head is locked so it cannot rotate, and make a remote fuel supply. I have been asked about mine so I will make a video on how to make one.

[@TheBinzo61]

Thanks for that video ! You did a great job of explaining all the wiring . I hope you do another video of installing the PCM and check engine light inside the car with the fuse block . Thanks again !

[@rust_hoarder_garage]

There will be many more videos with these wiring harnesses, if you check out the 1951 Hudson playlist there is a video with the first start that goes over the fuse box installation. I will be doing a cam swap video / stand start up on a 6.0 soon, I can go over more of the under dash wiring bundle at that time, if you can't wait I do go over all of those wires on the 2003-2007 wiring harness review video. Thanks for watching!

[@TheBinzo61]

Thanks, I look forward to your next videos !

[@KCH46]

I followed your video of the 99-02 JP harness and she fired off first time. Thank you sir for your expertise. I only have one wire to my alternator and you said yours worked. Thanks greatly for sharing your knowledge.😊😊😊

[@rust_hoarder_garage]

So far the one wire alternator is working, but the voltage reading is not consistent, I may have a bad alternator and will be swapping it out at some point.

[@KCH46]

@@rust_hoarder_garage I’m hoping the one wire works. I find your builds inspiring. I had a SBC in the 46 Aerosedan, when I brought it home. My son traded me a 78K mile 5.3 bare. I had to get everything and finally got it done. I don’t think I could have done it without your videos. I’ve watched 7 or 8 so far. Keep doing your thing.

[@rust_hoarder_garage]

Wow that is really great, really appreciate the feedback. This is why I am doing the videos, that is great that they are helping with your build.

[@sergey6412]

Thank you so much for your videos! So helpfull

[@rust_hoarder_garage]

Glad it helped!

[@GrandPitoVic]

I found KZbin is very slow growing. TicToc took off for me. I have so much fun making videos. I am definitely starting my engine on the engine stand before I put it in lol. I am doing a Ls3/6L90E swap in a 03'Crown Vic Police Interceptor with my grandsons. First swap but not my first engine lol.

[@rust_hoarder_garage]

Channel growth will come, I am doing this for fun so I will not be posting on other social media (no time!) I have been doing these builds for over 30 years, started the channel to have some fun, and it really is a lot of fun!

[@GrandPitoVic]

That's awesome!!! Really is a gorgeous car. It's alot of fun.

[@sergioruiz7017]

I got one after seen your video work perfectly started right up are the wires cheap yes but like you said for the price perfect

[@rust_hoarder_garage]

Excellent! Thanks for watching!

[@jimkelley6366]

WOW the work bench is very organized. LOL

[@rust_hoarder_garage]

Thank you, I pride myself on a clean work space :D

[@davea5113]

Thanx for the great video! This is my first swap (2003 LQ4 with a 4L80e) going into a 89 Chev truck and I am going to get the same harness and try to adapt the 80e tranny wiring to it.

[@rust_hoarder_garage]

That will work, good luck with the build!

[@Ed.Barajas]

I’m also looking for the 4l80e harness but pictures don’t show the extra plug for tranny unless there not updated

[@rust_hoarder_garage]

@@Ed.Barajas this is a 4l60 harness, they sell an 80 harness but the extra speed sensor wiring is shipped loose with the harness, you have to install.

[@Ed.Barajas]

Jy performance sells it?

[@rust_hoarder_garage]

@@Ed.Barajas I am sure they do, I bought one but the earlier DBC version.

[@adrianfleming1670]

Thanks for the awesome videos! Keep up the good work! Doing my Ford F1 in a few weeks, LS 5.3 and jag install. Wished you had videos up of that, but have seen it on FTE, wish we could chat have a few questions! Take care and , your videos keep me busy most night! 👍👍

[@rust_hoarder_garage]

Thanks, yes those are my F1 builds on FTE, the Jaguar IFS fits the F1 like it was made for it, easy install. Both of my F1s have gen 2 LT1s in them but I think I will be swapping to an LS on a future video series.

[@adrianfleming1670]

@@rust_hoarder_garage I had a feeling they were yours and awesome work! I will be going by your measurements as long as the alignment and everything worked! This is actually a project my 16 year old is starting! We love the videos! What year master cylinders did you use, our 4th gen f-bodys mount at an angle! I don't know. I know there's a difference in years but I don't know physically what's the difference We have the f-bodys foot pedals already

[@rust_hoarder_garage]

Use your own measurements, I have found there are differences between trucks, they are not all exactly the same. I used 4th gen F body and modified the firewall to mount the booster so it was level. Same way I did on the 51 Hudson, it also has a 4th gen F body booster and master, check out the video series.

[@adrianfleming1670]

@@rust_hoarder_garage thank you so much sir!! I will the measuring it out and then putting the fenders on but I was just looking for a rough estimate. And I was looking at the brake booster that you had on the 51 but it looked like the mounting plate was flat on the back and not angled but maybe it was just an angle of the camera I've been watching lots and lots of your videos thank you thank you I appreciate it keep up the great work

[@jerrywilliams8733]

Thank you so much. I was wondering if the cheapo harness was legit or not. Looked decent I really appreciate your video.

[@rust_hoarder_garage]

I used the same one in the video in the 1951 Hudson build series, it has been working just fine. There are cheaper ones but I prefer the JY Performance made ones. Thanks for watching!

[@scotted6136]

Nice video .

[@rust_hoarder_garage]

Thanks and thanks for watching!

[@kingchief8062]

What about the plug for the neutral safety switch for the transmission? Did it not have one

[@rust_hoarder_garage]

Not part of the stand alone engine and trans harness, that is part of the vehicle harness.

[@kingchief8062]

Oh ok, I get it now. Thanks alot

[@davidpate7807]

My engine starts but immediately shuts off. What Am I doing wrong? Your videos are great, any help is greatly appreciated.

[@rust_hoarder_garage]

Sounds like either VATS is still enabled or the MAP or MAF sensor is not working for some reason. Thanks for watching!

[@davidpate7807]

@@rust_hoarder_garage thank you very much

[@hudsonbiancaniello4326]

I’m 15 doing a ls swap on my 1935 hudson so it’s really my first time doing this. but I ordered a harness and it has female end 02 sensor plugs when I need male. Could I start it with out plugging those in?

[@rust_hoarder_garage]

If you are using the harness that I show in the video then you must have the wrong O2 sensors, none of the harnesses I have bought had the wrong O2 connectors on them. The engine will start without the O2s hooked up but I would double check what connectors you are looking at and what O2 sensors you have.

[@hudsonbiancaniello4326]

@@rust_hoarder_garage yes I have ordered the ones I need. would I be able to do a first start without 02 sensors while I’m waiting for them to arrive?

[@rust_hoarder_garage]

@@hudsonbiancaniello4326 yes

[@hudsonbiancaniello4326]

@@rust_hoarder_garage thank you for responding so quickly.

[@mytoman120681]

hello!! thanks for your video. What about the oil pressure sensor? It seems to me that this harness lacks this connector. Should an aftermarket one be placed towards the PCM?

[@rust_hoarder_garage]

No harness has an oil pressure connector because it is not needed to run the engine. I run mechanical gauges.

[@chaddavis7228]

Do you know if the guys at jp harness do any other platforms hemi , Duramax etc or do they just do ls . Hope you have a great day.

[@rust_hoarder_garage]

Sorry I do not, I know nothing about them as a company. I only have experience with their LS harnesses after buying them.

[@chaddavis7228]

@@rust_hoarder_garage no problem have a good day

[@Cobsspeedshop]

Could you use this with a manual transmission?

[@rust_hoarder_garage]

sure, just tie up the trans connector out of the way. I am using a 60e harness with a TH400, just didnt plug in the trans connector. You will still need the VSS connection.

[@jasonbarnes2636]

What could go wrong? 🙂

[@rhhoard]

does the computer need a signal from the trigger wire on the starter when it cranking over the engine

[@rust_hoarder_garage]

no, the starter circuit is independent from the engine and trans harness. Crank and cam sensors tell the PCM the engine is turning.

[@mytoman120681]

hello!! I have some questions regarding how to energize the PCM. Should the red wire from the relay center of the wiring harness come from the ignition switch in the key on and crank position? Should the starter solenoid cable also come from the ignition switch in the Cranking position? Am I correct in all this? BTW my wiring harness is for a DBW engine. THANK YOU VERY MUCH IN ADVANCE!!

[@rust_hoarder_garage]

Correct, small red wire from the relay center needs 12v when key is in the on position and also when key is in cranking position. Starter solenoid gets 12v from ignition switch when in cranking position.

[@mytoman120681]

@@rust_hoarder_garage thanx dude you are the Best!

[@rust_hoarder_garage]

Thanks for watching and good luck with your project!

[@SalRomeo-u6r]

I wasn’t clear on the starter activation. The starter wire doesn’t need to run through the pcm. I can just run it from the key to the starter or am I incorrect?

[@rust_hoarder_garage]

Starter wire is not through the pcm, I never said it was. I have it hooked to the battery and the remote switch.

[@DNorth-j2h]

What about Electric cooling fan trigger? is that on the harness? If not, how do you control an electric fan?

[@rust_hoarder_garage]

They are in the under dash bundle, not needed to start the engine. Green is fan 1 and blue for fan 2.

[@ShannonSullivan-o1z]

When you hook up the power to ecu before the fuel do you pose to hear lil noise coming from fuse box

[@rust_hoarder_garage]

You will hear the ignition relay turn on when it has power.

[@520dblock3]

I have a 5.3 and it came out of a 2007 Suburban, but I don't have the factory harness. Would any of these harnesses work? I also don't have a computer.

[@rust_hoarder_garage]

Only if it is a gen 3 engine, if the cam sensor is on the timing cover it will not work.

[@520dblock3]

@@rust_hoarder_garage Thank you!

[@520dblock3]

@@rust_hoarder_garage If it's on the cover, would that make it a gen4?

[@rust_hoarder_garage]

@@520dblock3 if it’s an 07 yes

[@520dblock3]

@rust_hoarder_garage Thank you, brother! You have a new subscriber, too! Excellent content!

[@mikesosa5192]

Did u need to flash your pcm from this.

[@rust_hoarder_garage]

yes, at the minimum you need VATS turned off for it to run, then turn off any DTCs not needed.

[@davidpate7807]

How are you getting fuel to the engine without powering the fuel pump?

[@rust_hoarder_garage]

the fuel pump is powered off the battery for the test. I have a remote fuel system connected, silverado sending unit with pump in a 5 gallon race gas can.

[@ShannonSullivan-o1z]

Everything is connected like yours but will not crank or sound like it want to crank

[@rust_hoarder_garage]

Impossible to troubleshoot across the net, watch the L33 video that goes over inspection of the engine and injector testing, maybe it will help. I have multiple videos with these harnesses.

[@Charlie-Oberley]

Do you know of they make this for DBC? I didn't see one from JY Performance with the multec injectors

[@rust_hoarder_garage]

They do but like everyone else they are wired based on the LS1 prints and need to use EV1 to multec adapters. I have one on my 55 Buick, I re-pinned it to match the vortec prints and used the adapters, runs great. The JY harness comes with the LS1 3 pin MAF and 2 pin IAT connectors, so you will need to get a Vortec 5 pin MAF/IAT connector to splice in and replace those if using the Vortec truck MAF.

[@KCH46]

@@Charlie-Oberley I watched his videos and ordered EV1 injectors. Mines different because I didn’t get a running motor and had to put things together. But I repinned and added where he said and mine popped off first time.

[@ballingonabudgetlsbuilder5930]

Do they have harness for L83 on the site

[@rust_hoarder_garage]

its from ebay, check there

[@6xcchamber971]

Hey there! I did the wire changes to the LS1 harness to fit my drive by wire gen3 engine. I have 1 wire left and it does not fit the evap on top front of my truck manifold. Need your help. Thank you!

[@rust_hoarder_garage]

No clue what harness you have but none have an evap connector. Use a meter to trace the wire and figure out what it is for.

[@6xcchamber971]

OK I have the same standalone harness you purchased on eBay or some where else. In there you showed the how to move wires around so the harness will work. It was made for an LS1 I believe you said. There is a 3" by 1" sensor on top of the vortec intake at the front. looks like a 2 wire plug. The plug that is left over that leads up to the front of the engine has a 4 or 5 pin plug. any Ideas?

[@rust_hoarder_garage]

you probably bought this one kzbin.info/www/bejne/rYDVq6KwZaiIq9k They are not all the same, I have found two variations so far of the 99-02 DBC. IMO this one with two MAF connector sets is the cheapest and it feels like a low quality harness, I have to inspect it further before putting it on a build.

[@hudsonbiancaniello4326]

I’m back with more questions I’ve been trying to figure this out for days. When I turn key on I have 12v but when I crank I only have 10v. I have a good battery and I’ve checked my grounds multiple times.engine cranks just fine I have no spark though. I’m wondering if you have ever had this problem and if you have a solution?

[@rust_hoarder_garage]

what car? Your wiring or factory?

[@hudsonbiancaniello4326]

@@rust_hoarder_garage I’m putting a cable driven 5.3 paired with a 4L60E out of a 2006 Chevy 1500 into a 1935 Hudson custom 8 touring brougham. The Hudson doesn’t have a single original wire in it that’s how I got it. So I have it wired to just some universal ignition.

[@hudsonbiancaniello4326]

@@rust_hoarder_garage and just some eBay harness

[@rust_hoarder_garage]

Sounds like junk ignition switch or your wiring, can’t troubleshoot via the net. No I have not had this problem.

[@cordellcartledge476]

Does that harness work with LM7 or L59

[@rust_hoarder_garage]

That one comes with multec injector connectors so plug and play for LM7. Need adapters or swap connectors for L59.

[@EdP-j1t]

p59 or 01? pc hammer or sloppy tune cab?

[@rust_hoarder_garage]

This is a 2003-2007 classic DBW harness, so is a P59. Stock tune from the factory PCM that came with the engine with VATS turned off .

[@carguy3028]

I ordered one of these and I did not know it mounts the ecu inside the vehicle. I have a 72 c10 with air conditioning and I do not have real estate inside the vehicle for an ecu. Has anyone mounted the ecu under the hood with this harness? I ordered this harness to replace an aging factory harness and i currently have the ecu mounted under the hood on the forward drivers side. There is no room under the dash and I have very little room under the seat because I’m using late model Silverado seats.

[@rust_hoarder_garage]

DO NOT mount the PCM or the fuse box on the harness under the hood, the connectors and fuse box are not weatherproof like the factory parts. Mount it up under the dash somewhere, even under the seat would be better than in the engine compartment.

[@carguy3028]

@@rust_hoarder_garage I don’t have that option, my ac takes up the real estate that a pcm would go. I don’t like putting the pcm under the seat because I actually drive this truck and sometimes I put things behind the seat I can see how they can get to the pcm harness and damage a wire.

[@rust_hoarder_garage]

What about inside the globe box? It would be worth it. If not then I would silicone all of the PCM connector ports where the wires go into the connectors, especially the open ones. Same deal with the fuse box, I would silicone where the wires go into the box and make a gasket to seal the top to the fuse box base. Mount it where water cannot run off a gutter and drip onto the PCM or fuse box. Could make a box to put the PCM in as well.

[@carguy3028]

@@rust_hoarder_garage I’m not opposed to re-pinning the ecu with a factory set of connectors. I have a running driving ls swap but when i tried to downsize the fuse box I ended up with a transmission code. My factory harness is old and has been repaired many times, the entire leg to the transmission was spliced in because it came from a rolled truck. I am looking for a replacement harness to my 21 year old harness, when I got it in 2010 it wasn’t that old but now it is, I also have broken connectors here and there. The re wiring a factory harness doesn’t scare me but since the gen 3 harnesses are now 20 years old I would like a new one if I am going to go through all that work to fix mine. Re pinning the ecu connector may not be a bad thing. If I mount the ecu inside I would have to get rid of the glove box, it will not fit with the glove box, the ac unit is directly behind it and a vent hose to the center vent is there.

[@andresacevedo6535]

Would you happen to have the link for the harness

[@rust_hoarder_garage]

No but I got it from eBay, part number is in the video made by JY Performance

[@KCH46]

@@andresacevedo6535 I luckily bought the same harness and followed his video and mine started first push. Took me a little bit because I’m not great with electricity. But watched his video and it worked.

[@RawTonyChevybuild]

Yes sir how did you delete the vats

[@rust_hoarder_garage]

Ls droid and tunerpro

[@RawTonyChevybuild]

Can you explain how to do it if it’s not to much

[@rust_hoarder_garage]

@@RawTonyChevybuild much easier to watch videos on it, plenty on youtube.

[@RawTonyChevybuild]

Thanks brother

[@RawTonyChevybuild]

Can I send my computer to you and you delete the vats and I pay you

[@JoshLong-ic4du]

Will this harness work for DBC

[@rust_hoarder_garage]

No it is a drive by wire harness. I am building a 1956 Chevy truck that is getting LS swapped soon, it is DBC and videos will cover that harness. Check out the build videos if interested.

[@JoshLong-ic4du]

@rust_hoarder_garage I definitely will and I'm going to subscribe to your channel thanks

[@rust_hoarder_garage]

very cool, thanks!

[@ShannonSullivan-o1z]

Seem like I’m not getting fuel to injectors or something

[@rust_hoarder_garage]

The L33 video tied to this harness video goes over more that may help, impossible to troubleshoot over the net.