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Ford f150 5.4 no start, no crank, no communications codes: u1900, u2023 – Auto Repair Chat

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In this video I bring you along as I diagnose and repair a 2006 For F-150 that won't crank or communicate with the PATS, ECM or Trans.
Good video on how relays work : https://www.youtube.com/watch?v=Mru8BbTGDwM

50 thoughts on “Ford f150 5.4 no start, no crank, no communications codes: u1900, u2023”
  1. Avataaar/Circle Created with python_avatars Paul C Townsend says:

    Your video was just fine. THANK FOR THE GREAT INFO.

  2. Avataaar/Circle Created with python_avatars Simon Jones says:

    I noticed when you put the camera to the fuse box som of the 10 ampers looked like they had been running hot!!

  3. Avataaar/Circle Created with python_avatars randy beard says:

    Seven years later-2022 and You Still Da Man….

  4. Avataaar/Circle Created with python_avatars Forced Induction says:

    Hey Eric well a big thanx to you for confirming what I thought. But what is rather strange is everything was exactly the same with this 04 I'm working on. But this one the relay ( the pcm power relay) would just work it's way lose and you would have no crank but the power everywhere else. So you would just have to push it In all the way and you would be good to go. Now here is what got me. I had a dead cyl. #2 to be exact. So I put a new plug in then a cop, then as a idiot would do then I check the cel . And it said malfunction in injector circuit. So I put an injector in still dead checked the wires, probed for cont. From injector to plug at ecu on the fire wall yep got a good strong beep. Spliced and grnd wire in at the injector plug and ran it to the fire wall. And no crank so I also have a noid light to confirm the signal wire for #2 injector . If I put the new power relay in and see if it will turn over or better yet start and I don't have that noid. Light blinking then I the ecu is bad. But as I said first that relay

  5. Avataaar/Circle Created with python_avatars Richard broadis says:

    You make the big name dealership mechanics look stupid

  6. Avataaar/Circle Created with python_avatars Jim A says:

    The guy owns a cat and leaves him in the truck. The cat has to piss, and pisses on the fuze box. Wow, that is really cat pissed green. Use CRC QD electronic spray. Brakleen can melt plastic. I think you should check to see if water is getting in where the antenna hole is. Or maybe the right mirror?

  7. Avataaar/Circle Created with python_avatars Jim A says:

    Yup, that fuze box is in an impossible location to view if you are a human, not so bad for an upside down, reverse, south pawed octopus. Once again ford wins the let's put it a ridiculous place contest. What was wrong with under the hood, ford?

  8. Avataaar/Circle Created with python_avatars Antonio Galvan says:

    good info man you are good at that

  9. Avataaar/Circle Created with python_avatars Jeff Hoag says:

    This brings back memories. Years ago I had a dodge caravan towed in. Bad auto shutdown relay, no click but all inputs fine. So ordered relay from dealer. Installed it and shipped it. Next morning the customer calls NO START, tow it in and relay clicks but no output. Told boss must be a bad relay. He says it clicks it’s good. Sitting at counter in office with relay on it we both looked down and saw a ant crawl out of a hole in bottom of relay. I took the cover off and lots of crispy critters burnt between relay. What would draw ants to new relay? Anyways sprayed area and new relay down with ant spray and shipped it. Had to eat a tow but was a crazy experience

  10. Avataaar/Circle Created with python_avatars Martin's MARTIN'S AUTO BODY AND REPAIRS says:

    You get all the stuff the dealers can’t figure out for repairs. At my collision repair shop I get used and new car dealers collision repair to redo the jobs right. Back to pre accident condition so if taken apart when I get done you can’t tell where I worked on it…that’s what I’m known for

  11. Avataaar/Circle Created with python_avatars Martin's MARTIN'S AUTO BODY AND REPAIRS says:

    Always makes me wonder how people have a job as a so called technician if they can’t figure things out

  12. Avataaar/Circle Created with python_avatars Richard Ortelli says:

    Do you have to put your mug on the page

  13. Avataaar/Circle Created with python_avatars Kyle Bailey says:

    I feel like I get smarter every time I watch

  14. Avataaar/Circle Created with python_avatars springfield45 says:

    An old one I have somehow missed. Woo-Hoo. Heh-heh, 3100+ subs he says…

  15. Avataaar/Circle Created with python_avatars Jon Bingham says:

    HEY ERIC. DON'T KNOW IF YOUR GOING TO READ ANYTHING FROM OLD VIDEO REPORTS, BUT IF YOU DO, I LOVED THE VIDEO. I LOVE DIAGNOSTICS. I'M AN OLD MECHANIC BUT THINGS HAVE CHANGED SO MUCH SO QUICKLY SINCE I WAS. I'D LOVE TO SEE MORE DIAGNOSIS. THANK YOU BROTHER FOR WHAT YOU DO. LOVE YOU BROTHER. GOD BLESS YOU. 🙂💖

  16. Avataaar/Circle Created with python_avatars paul pavlovic says:

    You Rock Sir

  17. Avataaar/Circle Created with python_avatars randy. voss says:

    It's a ford……just wiggle the key

  18. Avataaar/Circle Created with python_avatars david mueller says:

    Sometime luck comes into play ! Not much but a little

  19. Avataaar/Circle Created with python_avatars David Ward says:

    Sorry to have such a late replay. I have seen this same kind of corrosion on a device we use at work to test thermal imagers. We used to use a diluted dishwasher soap as a vacuum leak test chamber as a quality check. There is a power module in this unit that has a connector with spade pins. After several days one of the pins that provided communication would corrode with green crust and cause failure in the mech. These pins werent on the power circuit, however; during the test there was a electrical bias on this line. The problem was that dishwashing detergent has a lot of phosphates that will corrode copper when an electrical bias is applied. We ended up switching to a non-corrosive detect like "snoop" which stopped this from happening. probably similar situation with the relay in this car.

    Awesome work. I watch you all the time to help me on my vehicles. You do great work.

  20. Avataaar/Circle Created with python_avatars nicholas lewis says:

    Totally agree with your methods. Military has a acronym called “kiss” keep it simple stupid. I live by that working on cars. Its always something simple.

  21. Avataaar/Circle Created with python_avatars Robert Crowe says:

    👍l

  22. Avataaar/Circle Created with python_avatars James Gerard says:

    Been a mechanic for over 60 years, still learning, Enjoyed your vid and your attitude, Start with the basics – always. How many times does it turn out to be dirty battery terninals – that look clean even? My first car was a 1941 Chev Special Deluxe,. Wish I srill had it, Folks bought it at the factory for $900, New. Had a big rubber starter button on the floor. Put the car in neutral and stand on that thing, No relays, no solenoids, levers. Always worked, no reason cars still couldn't have them,

  23. Avataaar/Circle Created with python_avatars David Zimmer says:

    Outstanding diag. I don't know why but Ford has always had a ground issue with corrosion. Crazy to find sometimes especially on the positive side. I've found it 20" from the battery with no other sign anywhere.

  24. Avataaar/Circle Created with python_avatars mike says:

    No crank no start blower motor kicks on and continues to run with key pulled out of ignition . I will finish watching the video and cross my fingers and pray. This all started from me trying to unblock my heater core and in the process found a coil connection and the top of the coil snapped or broke .Because # 4 coil is tucked so far back and little room to access the heater core hoses ,it looks like somebody tried exactly what I did and snapped # 3 coil .So I replaced the coils and finding it easier to reach them by disconnecting the PCM and moving it out of the way I must have screwed up something..

  25. Avataaar/Circle Created with python_avatars Andre Maillet says:

    Your good…

  26. Avataaar/Circle Created with python_avatars Paul Mann says:

    👍👍⭐⭐⭐⭐⭐👍👍

  27. Avataaar/Circle Created with python_avatars David Newbould says:

    Eric you are one cool guy level headed and a great problem solver. Back to basics.

  28. Avataaar/Circle Created with python_avatars ed bermu says:

    well done the basic first. often a over look peace of mechanic skill in some mechanic outlook toward finding and fixing

  29. Avataaar/Circle Created with python_avatars 1000km/week says:

    I would have brought it to south main auto!

  30. Avataaar/Circle Created with python_avatars Tun213Tun says:

    I have change my relay twice already and it keeps on doing the same thing, it will start then after a couple of hours it won’t, any advice from someone that went through the same, i have a 2005 f150 xlt,

  31. Avataaar/Circle Created with python_avatars Ed Chenal says:

    Good video.

  32. Avataaar/Circle Created with python_avatars Richard Crouse says:

    Another excellent job Eric!

  33. Avataaar/Circle Created with python_avatars john t says:

    That is a sweet find.

    What caused it? I'd say crappy source materials, improper plating of said materials, dissimilar metal electrolysis, who knows? I've seen as such many times over my 50+ years chasing electrical problems in industrial settings.

    Closed contact, no continuity, happens more often that one would like to experience.

    Count your blessings, the next problem is likely to have more teeth in which to bite you in the ass with!

    Good work Eric!

  34. Avataaar/Circle Created with python_avatars John Plump says:

    I agree always check power and grounds before you go further. Very good Eric!!
    .

  35. Avataaar/Circle Created with python_avatars Mike Glasgow says:

    FIRST RULE OF TROUBLESHOOTING
    …….DOES IT HAVE POWER GOING TO IT ?.
    ALWAYS WORKS FOR ME.

  36. Avataaar/Circle Created with python_avatars Pherd Antler says:

    Eric, I've watched many of your videos and have quite an admiration of your skills, patience and knowledge (and humor). I've practiced electronics for over for over 60 years, examined dozens (if not hundreds) of relays and of the very strong opinion your relay corrosion was generated by a front pillar/windshield/cowl leak (salt water). Relays don't self destruct in the manner that was shown.
    Thanks for sharing your knowledge and time with us 'wannbe' shade tree mechanics!

  37. Avataaar/Circle Created with python_avatars Doc says:

    Comment

  38. Avataaar/Circle Created with python_avatars Grand Infinite says:

    What would cause worse than this? Put in the key and not a single thing. Not even a sound. Anything you can think of? It won't work. Dead as a board. A week goes by and she will start as if new. Drives normal. Then in a day or so? Dead for another week. Any ideas?

  39. Avataaar/Circle Created with python_avatars Magic Senior says:

    Did you check for oil and coolant. In my case I always check for power in fuel pump and ignition if that is not the problem then I check for other details

  40. Avataaar/Circle Created with python_avatars Magic Senior says:

    You are doing a great job watching from the Caribbean scope on A rope

  41. Avataaar/Circle Created with python_avatars Dennis Boyer says:

    Should not sacrifice reasonable billing because you found problem quickly and fix quickly. Debo

  42. Avataaar/Circle Created with python_avatars Don Armstrong says:

    My 2004 just did the same thing today in 2022 with no engine start but everything sounds and looks fine. I just started trouble shooting it and checked battery terminals for a clean connection and battery voltage at 12.75 that is good. I had out my wiring diagram to see what it might be. By the way I looked at scan codes and decided to ignore them and go for more obvious things. A common trouble I often find is either a bad connection or worse a bad ground lead. Far to many guys say "I've got voltages so there can't be anything wrong". That goes for relays to. I guess I'll stick my head inside the right side and check that relay first to see if mine has also leaked. Thanks for the info.

  43. Avataaar/Circle Created with python_avatars George Del Toro says:

    A great example of shops that have no clue how stuff works. They can't find the problem because they are clueless as to how it works. You must know how things work in order to trouble shoot it. This is what I was taught in the signal corps.c You could not take shoot if you had no idea of what the prob was and was areas could cause the problem

  44. Avataaar/Circle Created with python_avatars Bill Chmelik says:

    The BCM is in a lousy place, wet floor closed window…high humidity causes the BCM parts to corrode

  45. Avataaar/Circle Created with python_avatars Danny Cole says:

    Testing CAN at the data link connector more than likely wouldn't give you much info even thought it is pretty quick to test.

  46. Avataaar/Circle Created with python_avatars Bert Grau says:

    I bet when the other shop found out what the problem was they were thinking, Why couldn't we find the problem??

  47. Avataaar/Circle Created with python_avatars Jorge Costales says:

    Change that fuse #32 it looks good but probably internally defective it s happened to me before.placing tester completes circuit felay might have intermittent connection switch relay for seats or a/c controller til you get a new one. Open relay and check it physically coil may be droping out because you never know.

  48. Avataaar/Circle Created with python_avatars Honey Bear says:

    Whenever I am troubleshooting anything I'm working on I always start off with the simplest things first. And always start from the point of origin.