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zakruti.com » Auto & Vehicles » South Main Auto Repair
Eric O. Made The WRONG Call On This Caravan. Kind Of - Part II

Eric O. Made The WRONG Call On This Caravan. Kind Of - Part II

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Rating: 4.0; Vote: 1
Eric O. Made The WRONG Call On This Caravan. Kind Of - Part II Channel video: South Main Auto Repair - Category: Auto & Vehicles
Date: 2024-11-16

Comments and reviews: 20


nice repair Eric. if the mil was still coming on when she picked it up, she should have brought it back or at least called within a day or 2. charging for the repair was the right thing.
i've been out of the field for almost 15 years now. im going to guess that Mopar still tests a lot of circuits in the computer systems the way they have been doing for decades before.
i may have been told this back in the early 80s when i worked at a Chrysler dealership, or later on in one of the classes i took. i like how they did it & it works very good.
if its good, when you turn a circuit on & off, what do you get a nice inductive spike, even if there is a diode or a resistor in the circuit, its just toned down but the pcm can still see it.
when you key on a mopar, the pcm cycles a lot of the circuits.
its been a while for me, but i don't think they test all the circuits this way, but i could be wrong, i may be thinking of another brand, but as far as i know, they do not test the injectors and ignition coils at key on with a full power cycle, i want to say they just put a very low current through them, but as i said, i could well be wrong on that.
if, for what ever reason, the pcm doesn't see what its looking for, after a certain number of tries or amount of time, it will shut the circuit down to protect itself. use to be on some circuits, every so often the pcm would cycle the circuit to test it while driving.
if the circuit is shorted, sooner or later the driver in the pcm will die.
after the second replacement pcm with the testing you did and still getting those codes, knowing what oil & heat does to wiring down here, i believe i would've went for the wet spot and opened it up. i found those wet spots held a good 2025% of my repairs.
you get green crusty wiring, i got melted gooey wiring. here, you can tape a twisted wire joint up, put a tie wrap on the exposed end of the tape and not have a problem with it for years.
i know you don't see many vehicles with tons of miles that are 10, 15 or 20 years old, or older. 8 and older was most of our work, other than an oil change or state inspection, we didn't see much under 45 years old.
i really would have rather gotten most problems before someone else was into it. we had a number of other shops that we did wiring for, a couple of the places i asked them to not even hook up the battery on some of what they brought us. im not sure which were worse, body shops or transmission shops. over the years, i had a few wiring harnesses pretty much pulled off the car, opened up and laid out on my bench, it was cheaper than a new harness.
you sir kick some serious electronics/wiring azz.

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In some respects I am blessed that 95% of my repairs are covered under a maintenance (extended warranty) agreement. So I don't have to worry about charging the customer. Sometimes you go by the evidence and replace the broken item and it rebreaks for a call back. That's life. What really bugs me is some things are simple to diag, others difficult. I hate being nagged with are you done yet We need to use the printer When you tell them the problem hasn't raised a red flag yet, they think you are a crappy tech. You are just supposed to wave a magic wand and the issue is fixed immediately. At least a couple times a year, I will walk in the door, customer tells me what the copier is doing, then immediately asks what is wrong with it. I tell them I need to take my coat off, do some tests and narrow down the sources. You are right, you are not a charity. Non contract gets billed whether you fix it or not. You can fix anything if given enough time to do so. Time is money. A tough diag takes time, people don't want to pay for diag time, but they will gladly pay for repair time. Load up the parts cannon.
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Many, many years ago. 1969 Ford Galaxy 500 390 cu in V-8. Occasionally would cut-out on sharp right hand turns, especially at stop signs or traffic lights. Would start right back up though. I looked everywhere for a problem but could never find a bad component. It kept getting progressively worse Finally one night on a lonely dark country highway the culprit unveiled itself. A wire in a major wiring harness smoked itself and took out about ten other wires with it. That harness ran down the engine block and across a square corner at the dack of the block to somewhere down below. You guessed it; chaffage on that corner until a continuous direct short occurred. Problem now apparent and a real chore to splice in new wire jumpers. Ahh, the good ol' days. Your video vividly brought back those memories. Keep giving us these videos. Sometimes we learn a lot and sometimes they even lead us down memory lane!
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Eric, I agree that you run a diagnostic shop and not a charity but also think of it from the customers perspective. They brought the vehicle to a professional because they couldn't do it. You diagnosed it and they paid you for doing the job but you diagnosed it incorrectly. Was it a normal repair/ no but that is what running a shop is about. This is what give mechanics a bad name, how many mechanics miss diagnose on purpose just to keep a customer coming back and paying bills for work that never needs to be done. This repair would be expensive in labor for diagnostic to begin with as this was in depth but to ask the customer to pay for diagnostics multiple times because the mechanic made mistakes isn't fair to the customer. I respect your talent and you deserve to be paid and handsomely for this kind of talent but on the rare occasion that you make a mistake you need to step up and your lumps also.
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I had a 03 Town & Country. When changing the trans oil and filter I noticed that exact wiring bundle was in hard contact with that exact area. I tie strapped it away from the trans case to prevent a possible future chafe condition. Drove the van up to 288, 000 miles with no electrical problem. And guess what Never a failure with the original trans during its entire life, hardware or electrical. Another reason to perform schedule maintenance on trans oil and filter. Eric, you made the correct call to charge the customer with finding the root cause. The wire chafing did fail the last PCM the first time out. You even saved the customer money by replacing it with a used PCM. Most shops won't do that. You're a good man and GREAT electrical diagnostic technician. If the customer is doubtful, give him or her a link to your video.
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You need to be able to feed yourself as well as your wife & kids, what you did was an honest repair.
It's when a tradesperson whether they be a mechanic makes a dollar on the run that's when they become disliked, it's like Ivan from Pine Hollow Auto diagnostics was talking about a Toyota Prius he was replacing a blown cylinder head gasket on & he was saying that some dodgy mechanics will charge next to nothing by just loosening the radiator or coolant reservoir cap to relieve pressure from the cooling system then charging the customer $20 for it then calling it fixed.
Then the customer thinks that mechanic is a great bloke until the cylinder head gasket lets go completely, I don't have one of them whose a Hutt in my area in Australia, so I don't get that one of them whose a Mott!

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Wow, that is why it worked for four months before having a problem again. The owner had to be moving from park to drive to neutral to reverse over and over until the rubbing shorted out the wire from engine movement. I believe if this is explained to the customer (and why the problem did not reoccur for four months) if they are reasonable, they will have no problem paying it. My mechanic struggled with something that was intermittent on my car. I told him to come on a ride with me and I could recreate it. It only happened in turns at higher speeds (sometimes) so I took him to a nearby highway and showed him how to make it happen. Turned out one of my engine coils had an intermittent fault (but no code) so once they were replaced, the car ran fine.
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You spent a bunch of time debugging a good o2 sensor, and blaming the good o2 sensor for the bad wiring problem. All your measurements said the o2 sensor was good. I think that you should probably discount some of the OG sensor diagnosis and repair time. The second round of diagnosis blaming the used PCM was a poor assumption. I think that half of the round two diagnosis went down a rabbit hole you should have avoided based on the evidence you developed. Yes, charge for the Time and diagnosis, but I think you should be cutting the customer a bit of slack on some of your time because of your dedication to an overtly erroneous diagnostic. It was definitely a challenging diagnosis and kudos to you for going back and really nailing it.
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Third repairs should be charged to customer, I agree. The wire that rubbed through the insulation was fine until the motor mounts flexed enough to touch another exposed wire and short it. All previous hardware was scrutinized as failing prior to calling them suspect. Once repairs completed, no issues until the wires moved enough to drop the current. Its almost one of those repairs that you would have to fix this to continue to assess and complete a repair process. As you go, you find or don't another concern.
That hardness should have had a metal sleeve around it to prevent the wires from overly moving rubbing. Probably a good time to look for a southern 1980's90's vehicle that won't have these kinds of problems.

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A true mechanic admits fault, and criticizes theirself as a result which is what Eric did. During my career of evaluating failures on mechanical components for nearly 2 decades, and the root cause of those failures, I have found that mechanics are often too proud to admit when they make a mistake, but not Eric, and it's a great attribute. In my opinion, he did a good diagnosis in the OG video. The problem came after many more miles. Did the first computer go bad as a result of the short, possibly, but it may have just quit. The bare wire may have developed in the last 10, 000 miles, nobody knows. Eric is a stand up guy, and I learn a lot every time I watch his videos. Keep up the good work brother!
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My 96 cavalier manual ls did the same thing two years ago only it also was saying bad catalytic converter. Sat for two years started it up no light no codes for about a week did not complete a drive cycle. I start replacing weatherstripping ran the car got 72 codes saying my car should not be running. A week later car ran fine dropped to 32 all emissions codes. Changed the gross oil noticed the splash guards were all gone and the ECM and pcm were exposed to water. Now only one evap code, but the pcm won’t communicate with the ECM so no codes stored no idiot light. ECM and pcm in same location very corroded and dirty and someone did some funky wiring for the ac.
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I don't know how many times I have thwarted an easy repair with the hokey pokey inspection. Since becoming a SMA DIY Junky, the VISUAL inspection is always the 1st part after the money light lights and the scan tool tries to lie to me. Hands off buddy, this is my inspection. Unfortunately, it's my GMC truck, and it's not putting my kids thru college. Thanks to SMA for all the help and the chuckles that goes with it.
Dad joke for ya!
Dad: I lost at bar trivia last night on the tie breaker question.
Son: To bad, what was the question
Dad: It was. Where do women have the curliest hair
Son: OMG. and you got it wrong
Dad: The answer is Figi son. FIGI!

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I learned a very long time ago that some electrical problems are time and materials, no flat rate. Working on the girlfriends car, car won't start, dead battery (old battery, jump start and don't shut off for 1 hour. Again dead battery, Replace alt, not charging, another new alt. Not charging, Check circuit, bad wire, repair wire. Car works fine. Girlfriend almost happy again. Looking back yes it took too long, The old shoulda, coulda, woulda thoughts rule applies. I made a mistake, I learned from it and moved on. I've been watching your videos for a long time I'm impressed by your ability to troubleshoot and correct problems. Great video. Thank you.
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I knew when you first saw the failure on the drive there was a short somewhere. Where Hadn't a clue. Then you did the power brake thing and knew it was around the engine. Your methods are simple and correct - reproduce the problem. Narrow down the causes. Test as necessary. Find the problem. Fix the problem.
Sometimes the parts cannon is the best testing tool, but that's rare. Good diagnostics are rare as well, but are essential to good problem solving.
Now - I'm not qualified to judge your methods. I am qualified to say that I wish you were in my neighborhood. Sheesh. What a pro.

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I've pulled entire engine harnesses out of caravans 3. 3 / 3. 8 with crazy issues like this. Usually came or created by someone performing a tune up and not securing the harnesses. The wiring was not to intelligently secure or routed from the factory.
And yours even had good engine mounts!
I've contemplated changing my business name to Last chance auto repair.
and. you should absolutely be compensated for locating a previously non existent issue. not sure you shouldn't bill for the 2nd PCM. but there's that word of mouth thing.
Killer job!

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Sometimes it better to be lucky than good. sometimes its better to be good than lucky. However its always best to be persistent, even if that means step away for a coffee and use your big nose to sniff out the problem. The size of your nose is normally in direct correlation to other parts of the body I was told.
That's why you have a big brain too. I guess! Yes you need to get paid for your time. Its better than sending this to the crusher for a few hundred dollars. Cars are expensive. Cars are complicated. Good for you for sticking to it.

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That was very good troubleshooting Eric. You are very, very good at what you do. I certainly noticed the wet transaxle cooling lines and I have the same problem on my lower mileage 12 Chrysler 200 Touring convertible. I like my car so much that I replaced the grille with an NOS part I bought. I found that I had to remove the entire front bumper cover to replace the grille which allowed me to see where the transaxle cooling lines attach to the transaxle cooler so doing that job in the future won’t be such a mystery.
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Anybody who is, was, or has been a repairer of things knows about the intermittent issue. If this car was a few years old it might lend some weight to you missed or performed an incomplete repair not checking completely for the source of the blown computer. With all scenarios taken into consideration - age, mileage, state of components this is absolutely the best and cheapest scenario for the customer. If they can't see that you don't need them as a customer. Great Job, this was a fun one to watch!
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I've owned several Caravans, still do (they don't rust out in SC) and I've never seen that part of the harness chafed, your method of diagnosis mirrors my own, I'm always suspect when others have done work, and the harness clips on Dodges are plentiful and fail in 10 years (so lotsa new tie wraps all in the wrong place, a 3. 3L means that one was older than 2012, it all makes sense to me I'm more impressed that the car still runs at all I thought all Dodge/Chryslers rusted out after 9 years up North.
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I was yelling at the screen yesterday you must have a short on the positive. Like a dead short to fry a PCM.
And as soon as you said you put it in gear and the light came on I knew you had a wire problem. Back when I lived in the salt belt I've seen a few cars like that as soon as I go in gear or hit a pothole bang lights on and something's not working.
You still haven't found the problem yet so I might have to eat my shoe but it's got to be the positive control side rubbing ground somewhere.

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