John Deere 8420 will not move. CAN bus diagnostics

[@rdyardie]

I stand in awe of your ability to solve complex problems. Thank you for sharing.

[@AJVAN_]

This just shows me how good and reliable old beasts are

[@raycollington4310]

Well done sorting that puzzle Zeth. That tractor was well looked after and the farm a real credit to its owner. Thank you both.

[@alanclark639]

Ooo! I could feel the heat being generated by all those keyboard safety officers while you were deseating the cab - brave of you to video the evidence! Yet another run down of the crazy amount of diagnostics and subsequent reprogramming you need to do as the result of quite a simple problem. I see some others have mentioned Eric O so I'll chip in Ivan at Pine Hollow Diagnostics - an amazing guy for breath of knowledge and "keep on it" attitude - he succeeds so many times to fault find and cure where even the main agents have utterly failed - often firing the dread parts cannon with gay abandon. Great work Zeth. Btw - stunned again at the price of J.D. spares!

[@larrycole4438]

Maybe Boeing needs you to fix the problems they have. ZK YOU ARE THE MAN !!!!!!!!!!!!!!

[@tynewydd100]

Well done gents. Excellent video. Beats watching TV. Speechless.

[@verlinswarey507]

A lot of the reason why I watch these videos is from the sheer joy I get because I’m not the one having to deal with these hugely complex problems!!! Especially the diagnostics! I mean,holy,holy cow. 🐮🐄

[@douglassellers7528]

With all the electronics on these things you still have the purely mechanical side still there. Makes me glad I'm retired and just watch. Great video.

[@LukeLong-oi4uc]

I’m glad I no longer run my field truck commercially. The electronics are so advanced these days. It was almost like you were speaking a foreign language diagnosing the first tractor. Lol I grew up on tractors and started farming on my own in 1983 as a 14 year old. After high school I started wrenching and made a career in the heavy equipment industry. It’s amazing how advanced equipment has become in the past 35 years. I prefer the older technology. Great content

[@jimmyfreeze3782]

It's NOT advanced. CAN bus is nothing new, it's been around since the 1980's. Many people think a fancy display means complex tech. It's not complex...just a fancy display with the same old can bus communication. For decades, every car made has the same network topology, again nothing new.

[@shannonbrewer871]

A great tech is a curious person. You are curious and i dont think you were completely sold on a harness failure. Just pure experience and curiosity made you test that again. Nice catch my friend

[@timjorden8329]

That wiring blows my mind. But listening to you explain it makes sense. Those tractors are just too complex for the average guy to figure out

[@jdtractorman7445]

This is why customers need to understand the amount of time that is charged to them for repairs. Not every repair is cut and dry. Testing, replacing, reprogramming, relearning, all of that takes time if you want it fixed right.

[@jeromestrong5614]

Thanks for the ride along. Enjoyed learning alot from the Master. Have a Awesome day.

[@ZKMasterTech]

Glad you enjoyed it

[@charlesleeneihaus592]

You will be forever fixing those complicated tractors John deere will like you

[@jasonpark1052]

Had an 8200 that did something similar. CCD voltage’s go crazy, Coolant temp goes max, fuel gauge goes empty, corner post all dashes, transmission defaulted to neutral and once in a while it would turn into a crank no start. Ended up finding a couple of wires including the ACU ground broken under the insulation on the console side of the armrest harness.

[@heatherkohlwey8379]

You get your yoga, cardio, and weight training all in one. Thanks for the great video. Stay safe, and God bless.

[@kevingilbert9695]

Great job on fixing the nightmare of a problem. If Deere keeps making these tractors this complicated, you can literally name your price.

[@tallboy49]

Unfortunately all machinery manufacturers are the same. Just money pits.

[@antnotforwar]

This tractor is probably about 20 years old, just imagine how much more complicated they are now.

[@jessemaier8681]

Looks like your poor farmer customer is barely getting by! Great video

[@Thedevontree]

If my tractor broke down and I saw you jump out the truck I’d be like thank you Jesus.

[@bernardjackson7119]

The worst destruction is are fire in cab behind the seat. 7230R working in cotton picking bales up burnt 90% of the wiring harness plus the fuse box powder extinguisher got it out. Eventually got it back together. New harness and fuse box. What an absolute nightmare to sort out

[@joetrojan2568]

pretty cool how the seat doubles as a weight, smart thinking from JD

[@ZKMasterTech]

I’m not a fan…my back hurts lol

[@Mick6k]

When getting a seat out of the cab i usually drive a forklift to the back and then slide the seat out of the back window directly onto the forks.

[@douglaskrenik4102]

Did a similar thing when replacing the cab fans in my 6420. Seat out the back window.

[@deeppushp497]

Dilpreet singh kang Virk Kheda panjab malout muktsar 🇮🇳🇮🇳🇮🇳🥳🥳🎈👌👌🌾🌾🌾🌽💪💪👏👏🎉

[@deeppushp497]

Dilpreet singh 🦌🦌🇮🇳🚜🚜🚜🎈👌👌🌾🌽💪👍🆗

[@redbovine]

For those wondering. That harness is in the neighborhood of $7000 plus labor. On those heavy seats I turn them around backwards and set them in the back window seal upside down.

[@ronaldhowson1589]

This problem is a great proof of there is tomutch tec k inside tractors and other and heavy equipment. You need this unit just need start and run and do the job they are designed to do designed to do and cost the owners a fortune to own

[@kevinknight470]

I was a Level 1 Tech on Industrial Extruders, I feel Your Pain Brother. Thank God I am retired. Don't know what You weigh, but You are worth Your Weight in Gold, great Diagnostic Skills. Bless You Sir.😃

[@Gazman110]

Brilliant video. I really liked all of the technical info. I may not of understood it all but I certainly got the gist. Many thanks

[@johnlangley6449]

Man your help is a heck of some man power

[@richkloempken8473]

I was.surprised to see the tractor had a CAN bus much like automobiles, especially being almost 20 years old! Found Eric on the South Main Auto channel up in western NY. He is the master of troubleshooting network issues when other shops and dealers blast the car with unnecessary controllers that there is nothing wrong with. Being in the northern salt/rust belt, Jesse’s ore corroded/broken network wires. Always looking for open, short, and 120 ohm termination resistance on the network wires… He even is able to look at network communication signals on a digital oscilloscope to diagnose communication issues when network controllers won’t communicate properly. At least you don’t have to work on crusty/rusty issues on Ag equipment!😊

[@farming4g]

Sounds similar to a story from Warren from western truck repair with a truck wiring harness... would throw a fit when it would warm up. Run around thinking its an ecu, and finding out later that it was a tiny wire buried inside loom. It's a reason why it's called wiring mess; incredible how a little wire or two can completely brick a machine. Makes you feel any better dealing with wiring, had to replace "end terminals" on a new holland TG tractor... basically a plug that in sorts that "completes the tractor circuits" That was a bugger to figure out until came across someone who had an exact same issue and said to try to change those plugs

[@JohanLind]

Superb work. Hopefully we only pay our dues one time regarding specific issues... Likewise with life in general. Have a nice day!

[@jazzerbyte]

Great explanation of the clutch calibration activity. Wiring issues always seem to be the one least likely to consider.

[@SteveNicoson-u1i]

Thanks for another great video ZK and Joseph. It was interesting and very informative and entertaining for sure. Wow and wow. That tractor you worked on and all those wiring harness issues was something else. Wow again. You and Joseph had a lot of work time invested in that situation. Never would have guessed that seat was that heavy, oh my goodness!!!! Both you and Joseph are good sized and you were struggling with that seat. Most certainly a two person job. Let me insert something here to you ZK. Thanks to you for helping Joseph learn his lesson trade. You are a great teacher and showing him how to do things. My compliments to you ZK. I was amazed at all you had to do on this tractor wiring harness and all of the diagnostic tests you had to go through. I thought you both were going to need a sleeping bag-ha!!!!! I learned a lot watching you do all the diagnostic tests and how to do it and how to read the tests and the final readings. Most interesting!!!!! The gear case on that X9 combine was something else for you to get off. Was really frozen on there. Amazing!!!!!!!! Guess that is about it. Thanks for a really good learning lesson on this one. You are a highly qualified technician ZK. You went through that diagnostic session like a breeze. Wonderful work. Thanks for everything. The Iowa farm boy. Steve

[@jimclary7309]

Zeth great explanation as always, that's way you get paid the big bucks. You're a hellfa technician to figure out this situation you always come through. Keep the action and knowledge coming. Catchya at the next one. Stay safe!!

[@psychedelicgem]

I love your vids. You are like a space x fitter. You rock. There are so many models and variables and i love listening to your explanations. Im a dirty design engineer and i love your advice on stuff.

[@ZKMasterTech]

Glad you like them!

[@psychedelicgem]

Im fist pumping when you say 'no more codes'

[@psychedelicgem]

​@ZKMasterTech bro you are 🔥 you are a master !!! We say 'seco' in spanish

[@psychedelicgem]

What i dont get is why peeps in your tractor field dont just use normal bearings and fix them axially with keepers. This bullshot of press fits is sooo old school

[@psychedelicgem]

What im saying is bearings normally sized are sliding fit. Just put a slightly bigger bearing in to last longer whatever. Press fits and interference fits are lazy and cap

[@starkeythemadclimber]

Weve taken seats out the back window onto a pallet before. They are stupid heavy!!

[@TheVespap200e]

Thanks Zeth for the video! Always enjoy seeing some carnage footage too! That chopper gear case disassembly was impressive! Nice job! 😄👍

[@eworks9828]

Nice showing the process good and bad. Many would not have.

[@badzioch64]

You should’ve used your crane to hoist seat into cab. Great channel. You are a master tech for sure

[@LarryHart-cl4vm]

Wow sweet tractor to operate in the field but my hat's off to you men !

[@timstanford3443]

It is cool that you show the whole thing. We all have these things happen. Sucks you didn’t catch it before you removed that damn seat

[@kevinrice2721]

Love my 8120, probably my favorite tractor of my personal seat time 50 years. I did buy a new 6145 last winter, it's my loader/auger/snow/mowing/sprayer tractor. Getting used to it after couple hundred hours now but a lot I wish it had like my beloved 8x20 series.

[@andrewluymes2977]

Very similar to a problem I had with a 8330T. Most controllers didn't show up, I had dashes, water temp hot, Found a rodent had eaten through the 2 yellow and green can bus wires going the ccu. No other wires were eaten-its like he knew exactly which ones would cause the most havoc.

[@bennyharper862]

Enjoy your videos. So called farm machinery companies are as bad as the car companies for electronic stuff guaranteed to eventually fail . All a farmer wants is to plant and harvest. Everything else is a prayer

[@marilynallen644]

Yeah when you learn it the hard way you tend not to forget it 😊

[@rudolfbenner4802]

darn good helper.

[@johnlangley6449]

Daunting is an understatement 😮 but ZK is on the job end of problem…problem.yeah 😅

[@genechronister7085]

Another amazing vid! Very interesting and informative! Keep the deere's running

[@drbill44]

Oh CAN bus issues, you can chase your tail for a long time on those. I chased an open circuit clockwise on a F150 starting at the data link connector and found it under the drivers seat. If I would have gone counter clockwise I would’ve found it in a few minutes. Working in vehicle development most times harnesses weren’t available so you had to find and repair the issues.

[@rawhideadventures9515]

Stay awesome dude.

[@mfc4591]

Hectic stuff. It really gave you a dear John letter!

[@donalddehaven3229]

Love this channel. Great content. A true master tech

[@kerrygleeson4409]

Always interesting Zeth thanks for sharing 🦘

[@davidwatt1399]

Hey mate I work on mostly earth moving equipment in Australia and any time we get any sort of data link or can bus faults we go straight to any of the after market stuff that has been added and 9 out of ten times that where you will find the problem Cheers

[@encajeagricola]

Seems complicated right there mate !!!😂😂😂 all my luck to you !!!

[@taffysgarage]

Love watching the video zeth I learnt so much from you're videos

[@stevetrowbridge7101]

Great video be safe Texas farmer.

[@ronniedavis3273]

Another great one Zeth!

[@ZKMasterTech]

Thanks!

[@mikepierce3262]

I’ve been working on John Deer’s for about 10 years now and you are so right so times you just have to learn the hard way 😢 😂 and it sucks a lot you feel like you’ve just been defeated😂

[@oldadthomas]

Thanks for the video!

[@RichardThompson-gc1cf]

I HOPE THE RADIO PLAYS OK I LOVE MY 8 TRACK PLAYER

[@gcflower99]

Warren from Western Truck has entered the chat.

[@deanfrancis6474]

Great job

[@DjNewcomeer]

Maybe it could be an idea to unhook the door cylinder and strap the door to the tail flasher to get some more space for this heavy seat Greetings from germany and Keep the green iron moving

[@buckweaver5960]

Great video keep up the good work

[@Wileybird03]

Doing good work buddy👍👍

[@carrollclendaniel6577]

Keep the good work up

[@Richard-o9y2r]

I really enjoy your videos

[@danielbarwise8406]

Have done a full loom in 10 and 30 series. Not fun, especially reprograming controllers the old way. Can Bus is always a nightmare ;-)

[@diersirrigation]

Anyone else think cheech and Chong? First gear, second gear!

[@josephalaindaigle3194]

For the weight of that seat,I would consider a small boom like manufacturiers use😊

[@tenthousanddays2103]

It sometimes takes a lot of green to keep that green iron movin.

[@mikepierce3262]

And you never realize how small cabin is when the seat has come out 😂

[@danielschmidt2721]

I’ve had my fair share of problems with those controllers 8x30 8x20 and 7 large frame 30s. Nice job 👍. Why they fail 🤷‍♂️🤷‍♂️🤣

[@steveanderson4768]

Wow, that tractor could’ve ended up opening up Pandora’s box a $2000 computer and a calibration versus an entire harness at $8000. I’m glad you’re not somebody just to throw parts at something. !!!

[@nathansparrow1416]

I rest the seat on rear window ledge and tie it from falling out .

[@JulianMoore-kx6op]

Hi Zeth. Great video. Yup that crane of yours could have taken some of the load of the job oyking that bloody seat in and out. Julian U.K X KTGIM

[@macdawg6403]

Nice Vid!

[@johnwaby4321]

Nothing is easy to fix on tractors. Got to remove a lot of equipment just to get at the bit to work on . Well at least you did not have to replace all the harness 👍👍👍 So many set ups 😯. And then that A9 gave you sone trouble as well 😦

[@mariohoncoop7612]

Maybe take out the back window and have acces for the crane on the truck to lift out the seat??

[@randydehne8866]

heck ya brother

[@mitsnevets]

You slipped that seat right out of there

[@Big.Ron1]

Is the owner able to do these calibrations and code clearing or is it a dealer only thing? Thank you and be safe.

[@donaldkrueger-lk6wp]

great.

[@CseriGraph]

Hi Master, What type of 6-pin connector you see at 2:35, do you have any information about it? Case IH 51xx series also uses it, I can't get it anywhere... All the connectors on the tractor are Delphi type, but I can't find this one... Best regards Adam, from Hungary

[@fyrman9092]

The sucky part is getting the seat out was the easy part😮

[@jerryspangler6658]

Zeth , that seat can break youre back ! Smart to have help . Is there no room for any kind of lift system at all ?

[@charlesleeneihaus592]

Just think what that repair will cost or is it on warranty

[@craigadair128]

It’s a beautiful tractor but close to 20yo at this point. Whatever the bill is you pretty much just have to pay it and keep trucking.

[@ivoryjohnson4662]

Earned your money the hard way

[@Nighthawke70]

Rodents love to nom on plastics, especially soy or corn based.

[@dukefarms9155]

Hey zk, what’s the best way to go about taking the hvac venting apart on these tractors in the cab?

[@musthaveclutch]

Did you put old controller back in just to verify it was not somthing in the harness that might have corrected itself by moving it around? You need to get a scope,great for seeing what the bus is doing.

[@rednwhitecooper]

That’s nuts. Why won’t Deere let you just overlay a new twisted pair?

[@I_Died_2_Weeks_Ago]

Right! This would be the day I go independent. 😂 My goodness. 🤦‍♂️

[@tractorfixrable]

When removing a seat I extend my crane into the cab. Buckle up the seatbelt and lift and retract

[@refurbansuburban]

Why didn't you stick your truck crane into the cab?

[@russelltalma5806]

I'm thinking with the correct angle, use your crane for the seat.

[@SuperSecretSquirell]

The seat in a D8 is about the same weight. The only way to get it out of the cab easily is to lay the back as far back as possible, but doing that eats up valuable real estate for you to stand in. I hate pulling the damn things.

[@Kevin-t3t1k]

Hi zeth Look at Dtac 215732 it's saved us hours of diagnostic time. Not sure if it would work on ccd. I haven't tried it on older 8020,s

[@jasonhowell532]

I keep blowing out the terminator on the iso plug on the back of my challenger tractor. I have gone through 4 so far, what should I be looking at to try any fix it? The mechanics are stumped and so am I

[@agger838]

Expensive harmess

[@ms-mac521]

👍👍👍