Don't use a multimeter like this! 

Thank you for your comment

@@Diagnosedan so did this customer pay for the other garage incompetency.

Wow! Thanks that really means a lot!

I couldn't end the video without showing that!

Next week it is back when they still can't find the short in the junction box. Complete with spare junction box. I was wondering if they wanted it back to reassemble the mess themselves. I hate dashboard nuts, getting them off is bad, getting them on the studs is a nightmare.

@@Diagnosedan Imagine that customer has to pay hundreds of euros for this, only to find out it was a connector bent open touching the ground. He'll still get it cheap. I got my piston 2 melted somehow, piston rings are visible from top (or at least the fire ring) and that will cost me a new engine. and a few thousand euro. (I've got the news yesterday, Friday 13. What a day that was...) PS: Great diagnosis Dan. I love your way of thinking "outside the box"!

Never too old to learn. Great quality. Thank you for sharing your knowledge.

Hi Think someone is using your channel to invite your viewers on telegram

Bang on 👍🏻 naughty Dan tripped himself up & fell down the rabbit hole 😂

@@madds6678 The whole reason for the video is to follow in the previous technicians steps to see where he went wrong. Of course Dan knows that he should of done a load test much earlier.

It should have been indeed.

@@madds6678 I'm sure Dan has forgotten more than you'll ever know. Dan tripped nothing.

The man worked the steps and got the outcome and that’s what you do in this ever evolving headache of a trade

Unfortunately we also see that alot, but there are also alot of fantastic workshops out there with amazing techs.

@@Diagnosedan what’s the name of music at 00:51?

@@Diagnosedan I am getting messages from you for winning a prize, is the you or a scam?

@@thetraindriver01 It'a a scam, to verify click on the person sending you messages profile and you will probably see an empty profile.

Yes true most mechanics are people who didn't make it through school so that's why they are mechanics and don't care. Not all tho this guy is great. 👍

You've seen that right, i dont know what they were thinking 🤷

Absolutely, video should be titled I fucked up didn’t do 3 step continuity test spent hours when a minute was all that was needed 😂

That's right! 👍💪

​@@madds6678hi mate! What's the 3 steps of a 3 step continuity test? Thanks.

Yep absolutely, seems like we’re the only ones who understand that 🤔 everyone else banging on about a load test & even Dan himself should have done those 3 steps first & then would have found it straight away. Continuity testing is ok if you follow the those 3 steps then if ok next step load the wire. Sadly most people just do a open check. Whilst a resistance check isn’t bullet proof it’s still the starting point.

@@madds6678 I also say to my students never to use the continuity mode. After a while they start ignoring the reading and and pay attention only to the buzzer...

You both are absolutely right. I made a comment earlier about this, seems we think alike. The fault could have been found straight away with only the multimeter, no need for test light or scope.

@@satunnainenkatselija4478 We're talking about floating wires here. With connected wires unless you know what signals are to be expected a multimeter is not a lot of good and in some cases may even provoke more problems, in that case a scope is required.

True😁 Thanks for watching!

Thanks Richard!

My pleasure!!!!

Thanks!

A lot depends upon the electrical diagnosis experience of the previous tech. Dan came through. I'm glad the customer did not ask for new wires to be run and the problem would not have been found... we'd not have a great video experience!

The Automotive repair industry changed alot! Todays techs need to be experts in Software, telephones, navigation, bluetooth, apps, internet, ect...

@@Diagnosedan I'm a DIY mechanic and I have an aversion against the abundance of software in modern cars. I believe it's designed to break down on you after the dealers warranty expires to have you buy another car. So I prefer to work on my two 90s cars where I have full documentation on in books.

@@SE45CX that’s why the old cars are so expensive, now: everyone had that same idea.

@@SE45CX Software is fine so long as you get the software to fix and replace, just like any other part. The problem is the keys and the proprietary control which is so much easier to lock down with software so car companies have been taking advantage. I'm about to retire my entirely mechanical 25-year old van and yeah I'm not very keen on all the proprietary shite my expensive new car/van is going to come with. In many ways software is easier to fix than hardware - it's certainly easier to reconfigure, and interrogate, so it's not a bad thing in itself. The problem is the closed implementations we have in almost all cars.

Thank you 😁👍

Thank you

That should've been step 2 of the techs wiring check. Also I agree that the dvm is perfectly capable of checking for cross shorts. Don't need a test light for that. Also an overlay harness would've fixed it without having to hook up a meter. Multiple quick dealer fixes without all the swapping.

Yeap ,we always check short to positeve and ground not only wire broke,becouse we know what we doing. This is the only problems ..no need of scope here.

@@alanqtrmaine8175 Well, a test light will or won't light depending if there is a resistance to gnd or +v, like a chunk of rust in the back of a connector ... that's where 500 mA from a test bulb works well - you KNOW a short to gnd is truly a short to gnd.

Thanks Den you are Brilliant thanks again I learned

A simple tool but very relevant!

Dat is goed om te horen!

Lets hope he's learned something after seeing this video

Loaded testing and indeed voltage drop are the way to check your wiring.

You always have to think what it is you are really measuring. If, as Dan found, A & B are connected, you must consider the possibility that they're both connected to C. Good reminder - I could see myself falling in that hole.

Yes you are right multiple pins were poked.

That's great to hear!

Thank you so much Fred 👍😁

How did you donate $50 to Dan’s video?

@@OilBaron100 I never did it but I think I once saw it. You go under the video where there is things like download, save , share etc. There is thanks button there, which simply is donate button. Check out you will see it. This man deserves a lot MBS Moshitoa south Africa

@@OilBaron100 The "Thanks" button

As long as its all put back together the right way it should be fine😉

Thanks for watching!

My first thought, a continuity test has no resitance, so could be breaking down under load, although this turned out to be a signal wire so not a problem. There again I was an electrician so I would have checked for earth fault 1st thing you can miss so much with just a continuity test

Why wasn't the wire smoking or burned up with that improper contact to ground ?

That's why the title of the video is don't USE a multimeter like this!

Yes, green and brown seem to be in contact as well. So this other workshop guy used two massive test probes and bent both of these terminals.

​@@koeniglicherSomeone did, but not necessarily the other technician. Could have been the owner who then sent it to the technician after causing the damage. Everyone is going to be a Shaggy in this situation.

@@chrishartley1210 OK, good point to not accuse anyone. I ruled out the owner, as the purple and green wires are affected. To find out, that these are the relevant ones and are avilable at this connector, this would need a wiring diagram (or some "internet advice"). I do not commonly associate owners with reading wiring diagrams and tracing wires over multiple connectors but rather workshop technicians. Still, your point is very valid indeed.

@@koeniglicher Perhaps he was looking for a different fault, perhaps it was another technician, perhaps... Dan did say he needed to get permission to fix the fault as the owner may want to do the work himself, which is what gave me the idea that it could have been the owner. Anyway it's not that big a deal and we are never going to identify the guilty party. 😁😁

@@chrishartley1210 Dan should isolate these two/four terminals temporarily (like with a small plastic tab) and see whether this the only fault or whether there are more issues with the wiring. Because there can be more of them, especially after all this ripping the car apart.

Even more given that, if that occurs and you fix it, you will have removed the effing dashboard and reinstalled, in the process! Make sure she sees that... :)

Ha ha ha🤣🤣👍

Don't forget the mansplaining!

Thank you

That connector seems to have multiple shorts - look at the other connections too! The brown end wire looks shorted too. Someone must have been very heavy handed with test probes!

New electric parts, which they can't return like bad brakes or filters

Dealers do this. I was a truck driver many years ago. I diagnosed the truck as having a bad ecm. The truck would burn coolant temp sensors after 3-7 hours of use. The owner took it to the dealer, they charged $4000 dollars, changed a bunch of parts, told the owner they couldn't fix it and to take it to the dealer of the engine manufacturer. This is normal in this day. It's the death of expertise. There are very few like diagnose Dan.

@@Tomaskii I know that they can’t return the parts. My point is that if the dealer or shop misdiagnosis the fault, they should pay for parts that are unnecessary put on the car. If that were the case, they would think more before ordering new parts.

@@Capitanvolume This a good example. People wouldn’t pay a contractor that was called to fix a leaky roof if he would install a new chimney and the roof would still be leaking. In the automotive world however we somehow accept things like that.

@@Conservator. customers pay is the problem. I would have left and never paid. The owner insisted on maintaining relationships. Not sure I would be maintaining relationships after I was mugged

Or you could save the hassle of that & do a proper continuity check after the first test by just touching to positive & earth on the disconnected circuit 3 simple steps which would find this in less than a minute then a load test if above is ok.

@@madds6678 I do that too. Most mechanics do all of the above usually.

Thanks for the positive comment its really appreciated 👍

@@madds6678 would have been a short video and we would'nt have learned as much 😉

Thanks for the positive feedback!

That is exactly what Dan used in the video, a test light as a load. Doesn't need to be 4A, but it would work also.

@@BrainHurricanes The test light is ok, but 4A is too much. These are communication wires with small diameter (rated usually at 5A tops). Pushing 4A over them may cause overheating. Not a good idea. Be very careful using that technique.

I thought so too. I can't really see why that won't work.

Indeed that would have worked. I saw the failure straight away because he failed to check the connection on the fuse box. With these wirings it's imperative to check EVERY connector. I would have done the last part of the video (where he replaced the wires) right before using the scope. It's an electrical engineering procedure called "finding the least probable point of failure". Many cars have failures in the wiring loom when it passes the firewall or other parts caused by vibration and degradation of insulation. The title of the video is also incorrect, it's not about using the multimeter wrongly, it's about not using it sufficiently. No need for the scope or the check light. An ever better way is to use the multimeter in ohms mode, zero to two ohms means 100% continuity, anything above means check the connections because they may not be connecting 100%. He only checked the pins of the connectors on the immobilizer and the ecu, but you need to check each and every connector in the wiring. There's most probably another connector in the interior on the drivers side right where the firewall is, or there might even be a connector in the hole of the firewall (this is used in many modern citroens). Sometimes dirty or oxidated pins are the cause of failure. Using contact cleaner on each connector is also good practice.

Thanks for always leaving a positive comment thats really appreciated 👍

Thank you very much!

Ontzettend bedankt voor je positieve reactie Geert, helaas geen wasmachine gewonnen 😉

Thanks Nico!

Broken wire?

Thanks for your comment 👍

Thank you

Thanks i will

Exactly!

Thank you Anthony

Thank you very much

It can be a challenge

@@Diagnosedan Yes, but what is life without challenges? Boring, is my answer.

That's so good to hear!

Thanks for Subscribing, these models are know for unreliable wiring diagrams

Thanks for your comment

Thanks for watching

It wasnt a boring oil change😉