This is Why Load Testing Electrical Circuits is so Important!

Рет қаралды 58,253

2 жыл бұрын

In this video we diagnose an unresponsive vehicle security module on a 2004 F-150. Key fobs, lock unlock functions and auto headlamps all were no longer working and the fix may surprise you!
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Пікірлер: 280

@carsurvivalist 2 жыл бұрын

LOAD testing is a hot topic these days. Thank you for actually explaining how to perform diagnostic tests.

@randallmunson9909 2 жыл бұрын

@jerryrounds8586 2 жыл бұрын

This is why people from all over the country travel to this shop for repairs. Great video.

@Alex-px2mb 2 жыл бұрын

You do this right, Brian. My dad's an electrical engineer and used to own and work on IBM mainframe computers as a CE for IBM. I showed him this video because he's actually working on another car and he said: "Yeah, that's how you have to do it. Swapping parts will kill the customer and you might not find the real problem." Great work as usual.

@rickacton7540 11 ай бұрын

what does your fathers mainframe career have to do with not using the parts cannon....?

@MrBinmonkeys 2 жыл бұрын

Your apprentice just became wiser with electrical diagnosis by watching this than I was after 6 years in the trade.

@davestewart9146 2 жыл бұрын

Technology is cool when it works but there’s something to be said about my old 77 f150 4x4 with manual windows and door locks, awesome video Brian 👍😁

@calholli 2 жыл бұрын

I feel the same... I can't wait until they come out with a super basic electric car, but with manual windows and locks.. manual everything, except the accelerator.

@karlwithak2687 2 жыл бұрын

Very good way of demonstrating load testing ! I sent this to my son . I was impressed the youngster noted the 11.5 volts which led into the load testing lesson . Very awesome teaching here!

@dangerdavefreestyle Жыл бұрын

Proper diagnosis is what its all about. A tool that helps with that is worth its weight in gold.

@nidnar60 2 жыл бұрын

It's sad, but 90 to 95% of the mechanics along with the service writers that I know and have worked with would have gone the easy route, causing the customer more time and money just to get more on their pay check. Great Video!

@jimmyconn7314 7 ай бұрын

As a mobile mechanic this video once again is so very helpfull,and time/cost saving.ty for your expertise sir

@rodcarpenter849 2 жыл бұрын

The best video on load testing circuits. It takes some time but can save car owners a ton of money. Wish all mechanics understood this

@s.j.5850 6 ай бұрын

Great tips on load testing a circuit to see if it can power the circuit. Don't try to hang off the side of a building with that gauge of wire though! Keep these excellent videos coming.

@rjinnh3933 Жыл бұрын

If you can wade through this longish post, here goes. Had the same problem in my 2000 Expedition but without the rust. Green wire with yellow stripe in a bundle running down to the floor on driver's side to power the box under the driver's seat that provided 'Power Seat' adjustments and some other functions. The wire was on the outside of the twisted bundle where there was no tape wrap to protect it and it rubbed up/down on the edge of a Pinch Weld. The up/down rubbing, from normal driving, wore through the insulation and the wire. The exposed wire ends corroded and turned green leaving just a high resistance green powder behind. Luckily I had bought a full set of 'Moderately Used' maintenance docs on Ebay and was able to ID the box, pinouts and To/From wire routing. As I was separating the green/yellow wire from the bundle, I saw discoloration on the wire, opened the insulation and the wire was corroded back 3/4 inch from both ends. An easy fix just like Brian did. Snip/Snip, Crimp/Crimp. In 2015 I bought this 190K 5.4 2V Expy for $500 with '$500/Will Not Start' painted on the windshield. A few weeks later I replaced the 'In Tank Fuel Pump' motor and it ran just fine. I have fixed many of the problems in this vehicle that Brian has presented on UToob except a Timing Job. I'll start that in a few weeks with a Melling Timming Set/Oil Pump, Ford Water Pump, 7 Cal Van Inserts, 2 each O2 Sensors, driver's side exhaust manifold and Radiator Support. Hope to be done by Thanksgiving. HaHa.... I just couldnt resist adding this longish post to show that I had a 99% duplication of Brien's vid but going back 7 years. I have saved every one of Brian's UToob video posts. I'd love to see them all on an Indexed DVD. Brian should be able to sell thousands of them for $25 each. Seriously..... Brian is a National Asset. His presentations are Pich Perfect and he cuts to the meat of the problem without extraneous BS. I've been following him for years and should look thru my UToob Libs to see when I started saving him. Because of Brian, there are many Ford Trucks/SUVs on the road today instead of sitting in a Bone Yard waiting for the Crusher. I'm confident that my Timing Job will work out Just Fine because of Brian. BTW: I'll be using a Melling Timing Set, Oil Pump and FelPro gaskets. Ford prices are Ridicules. That's my story and I'm stickin to it........

@Internutt2023 2 жыл бұрын

An old 55W/60W sealed beam low/high beam bulb can make a good load tester/continuity indicator and current limiting device too (most old school mechanics probably have a spare one somewhere). Good detailed explanation on troubleshooting this issue!

@bobbyedds9554 2 жыл бұрын

An old sealed beam is my go to for testing fuel pump circuits.

@Viper81766 Жыл бұрын

Definitely

@MrSpeedyCrane 2 жыл бұрын

Thanks for showing everyone how do things the right way. I think it's awesome that you're teaching your son how to be an Awesome Master Mechanic like yourself. Learn everything you can from your Dad he's the best honest Mechanic out there! As always thanks for sharing Brian!!

@richard1835 2 жыл бұрын

This Auto Electrical diagnostic video is definitely worth watching again. Thank you FordTechMakuloco

@waqasazmat81 3 ай бұрын

Thanks for educating us on the load testing!

@VinniePepperoni 2 жыл бұрын

Great video, would love to see your excellent diagnostics and repairs include how you put the wire back that you cut at the module and the one you fixed at the rust spot because there are many techs that really drop the ball on those wire reconnects and many could take a real pro instruction from you to do it 100% correct

@R3YNZ 2 жыл бұрын

I love these. These types of jobs are one of the most satisfying. Great work as always!

@edman1015 2 жыл бұрын

Another GREAT JOB FordTech. You were born for this kind of work. You have found your gift. God is good.

@jcvinaja5542 2 жыл бұрын

I've bumped into an issue where the TCM (transmission control module) was declared bad based on codes we got. The new 10 speed transmission slammed hard into gear and wrench light came on. We decided to do a load test. We later found a wire that powers the module to be making contact on the chassis. Cut and replace that part of damage wire. Taped it good. Navigator shifted great like nothing was wrong. Its time consuming but worth doing.

@kevinstrident 2 жыл бұрын

Excellent demonstration of both the though process in troubleshooting and load testing!

@mohawkmike142 Жыл бұрын

Great repair along with the diag. Top notch Ford guy right there. Thx for the video.

@mikechiodetti4482 2 жыл бұрын

Load testing is the best. Use a headlight bulb(s) with a load close to 30 amps gives you plenty of light for working in the area however, the wiper motor is a nice touch. Plus gently holding the gear varies the load which can be helpful also. Nice fix Brian.

@Chuck88vert 2 жыл бұрын

Your a excellent tech. I have put to use your videos. I did my timing set using your 5.4 3v videos on my 07 gt. That was 70,000 miles ago still runs great.Thanks for your work to bring use very useful videos.

@walcrow7319 2 жыл бұрын

The MASTER at it again. Great video and extremely helpful for when my 2014 E350 pops up with some electrical issues.

@roberthickoxjr 2 жыл бұрын

Thank you from the bottom of my heart. Great troubleshooting info.

@stephenmoxley3004 2 жыл бұрын

Another great diagnostic case study, Brian. I guess, living in the Midwest, you have to deal with lots of rust and corrosion issues causing all kinds of problems. Keep up the great work.

@richardthomas1743 2 жыл бұрын

Thank you for the excellent explanation and demonstration of a wire load text !

@Don14320 2 жыл бұрын

loved the way you approached the issue, you are showing how us to look outside the pass fail status and to see and find the root cause.

@wonjat5 2 жыл бұрын

A really good illustration of how to carry out basic testing of power and ground circuits.

@rogerreyes6515 Жыл бұрын

Awesome work, love your videos. It's good to see you take pride in what you do. Keep up the great work 👍

@apoc341 2 жыл бұрын

Great video. Thank-you for showing how to go through the steps to diagnose an issue like this. 👍

@kato223 2 жыл бұрын

Great diagnostics! I had one in the past where I thought it was the computer module. Luckily I was getting them for cheap from a wrecking yard, but the issue was very similar. What happened was the cover to the wires cracked and went away on the back of the engine. The exhaust manifold was right there and the wires started bouncing off the manifold. The wire cover melted exposing the copper inside and when I would go up a hill or accelerate over a certain amount, the wire would short out on the exhaust manifold and kill the engine right then and there. It was annoying as all get out. Thanks again for a great diagnostics!

@leonciorodriguezaguilera9513 2 жыл бұрын

Getting Better All The Time Amigo Fordtechmakuloco, Excellent Video Tutorial !! Thanks a Lot For Sharing ✌🏼

@Mr2004MCSS 2 жыл бұрын

Nice job. I cut off several of the light bulb harnesses out of our junk 93 Cavalier out in the field and made some test lights that I use for load testing circuits. They work well. I measured the amp draw of each so I know how much they draw.

@ReclusiveMountainMan Жыл бұрын

Great to see your son learning from the best.

@Afrattzz1 2 жыл бұрын

Excellent diagnosis Brian. Thanks for the video

@Markomyt1 Жыл бұрын

Great work Sir! I learned a similar lesson from the wiring loom coming through the door to the body. Several wires broke from the constant flexing.

@terryharvey4811 2 жыл бұрын

Would have been disappointed had you not cleaned up that body ground while you were in there. I remember all the ohm testing the trouble trees had us do when ecms first hit the market. 9 volt battery powered ohm meter would give proper ohm reading but I found out the hard way {many wasted hours} that a load test would show a compromised wire in a heart beat, saving loads of diag time. We need to keep this in mind, as ohm meters will sometimes lie.Thanks for helping spread the word.

@tbirdguy76 2 жыл бұрын

good to see people going the extra mile and actually doing the diagnostic work needed instead of just turning a quick buck; how many other shops would have swapped PCM and sent them on the way,

@stevec5657 2 жыл бұрын

That's an awesome lesson that can be applied to almost every vehicle out there, thanks!

@mikekokomomike 2 жыл бұрын

voltmeter readings can be misleading without a load applied. I can get a voltmeter to read above 12 volts with some hearing aid batteries in series but they sure won't start a car.

@alb12345672 2 жыл бұрын

@@mikekokomomike You can also take a voltage reading across the wire when load is applied. The wire will act like a resistor, and create a voltage drop. Ideally a wire should have zero volts across it (maybe .1 at most). If you see 2-3 volts, that is being consumed by the wire (or poor connection). I always do that when I check a charging system.

@mikekokomomike 2 жыл бұрын

@@alb12345672 right on

@alphaomega8373 2 жыл бұрын

@@mikekokomomike Learn that lesson, thinking that all I needed was a volt meter, to test my AA batteries.

@richard1835 2 жыл бұрын

Thank you for a very well organized Auto Electric Diagnostic. Thumbs up

@Roudter 2 жыл бұрын

Brilliant. Diagnosis is an art. Thanks.

@isaiah4510 2 жыл бұрын

Great lesson. One of the best ford techs around. Wish you lived closer to me

@jwelchon2416 2 жыл бұрын

WOW!! That's some powerful diagnostic work!

@ronaldsinclair6837 2 жыл бұрын

Enjoyed your style of diagnosis.

@vinces8974 2 жыл бұрын

What a great teaching video, Thank you so much

@BuggysTowJam 2 жыл бұрын

Excellent case study Brian thank you for sharing this video for us! Liked

@LudekNesnidal 2 жыл бұрын

WOW I am learning lots of from you! Thanks for your videos. You are true professional. 👍

@sanity1977 2 жыл бұрын

Great stuff, step by step all the way! Thanks

@bassiclymike 2 жыл бұрын

excellent demonstration, very informative!

@advorsky1 2 жыл бұрын

Not only are you a damn good technician but you actually give a shit and care about your customers! That is why I sent my son to you when he was living close to your shop with his 2018 Ford F-150 just to have the transmission fluid changed but other than doing it ourselves we know that bringing his vehicle to you was the same if not better than doing the work ourself! Thank you for sharing information about Fords! Even though my older brother is VP at General Motors my other brother and I and my three kids we all own Ford products because they’re far superior to General Motors Junk!

@JasonWW2000 2 жыл бұрын

To be fair, every manufacturer is capable of building junk.

@adrianmack3 Жыл бұрын

Ford has the highest number of recalls due to building junk and leaving the customer to quality test the product.

@lisaa.powell3634 10 ай бұрын

Excellant troubleshooting skills! Thanks for showing the schematics as well as the pinout on connectors. You helpedme years ago fix 2 of the joints in the passenger rail by the fuse box. If i remember it was due to cholride in the tape that was used. I purchased the Ford splicing kit. So far mirrors and seats still work. Thank you Brian. Your son is very fortunate to be able to learn from a master mechanic.

@vicpetrishak7705 6 ай бұрын

3M Scotchkote fd manufacturers this coating for underground splices , it works well ! Great for trailer wiring .

@380.motorsports 2 жыл бұрын

Excellent troubleshooting as always.

@Matsterious 2 жыл бұрын

Great video! One of your best ones

@jamesbruno5896 2 жыл бұрын

Great tips Brian thanks for posting!

@jonclark1288 2 жыл бұрын

I always say that testing wiring is a lot like testing plumbing: If you've just fixed a plumbing leak, you turn the water back on and check to make sure the leak is gone. And if the pipe normally has about 50 psi of water pressure, you'd want to pressurize it to 50 psi when checking for leaks. You wouldn't put only 5 psi in it and assume it's good because it's not leaking at 5 psi. It could very well start leaking once the pressure increases to 50 psi. It's the same thing with wiring: If a wire normally carries 20 amps for example, you need to test it by trying to put about 20 amps of current through it. You can't put only 0.005 amps through the wire and assume it's good!

@paulhudgins5120 2 жыл бұрын

Nice job, you did a great job explaining load testing & how do the diagnostic testing. Just replacing parts doesn't isn't always the fix or the answer.

@pavelshagoiko3103 2 жыл бұрын

Great video, as well as others! Great job!

@anthonysova7117 2 жыл бұрын

What a great example for using load testing yes sir Brian excellent video like to add good continuity doesn’t mean good conductivity hardly ever use an old meter to test anything other than solenoid coils CHEERS AND THANKS

@paulfiebke3909 2 жыл бұрын

Loved it this was a very good video. Keep up the good work and God bless you and your family

@Pitcrw6 2 жыл бұрын

Nice work. Love watching your videos.

@stevesnop3798 Жыл бұрын

You are a beast of a technician. Love watching your vids.

@davidrogers5902 2 жыл бұрын

EXCELLENT video. Thanks. 👍

@michaelmurray121 2 жыл бұрын

Happy Friday Brian another great video ..

@dirtfireservices Жыл бұрын

That's why u have to know how to use a multi meter and perform diagnosis correctly. So many modules get replaced by incompetent techs. Great job on explaining everything.

@phillock7944 Жыл бұрын

Well done matey, excellent explanation.

@davehayden29 2 жыл бұрын

Awesome video. Thanks for content. You are a awesome and great tech. I wished you lived closer to west coast.

@davedeatherage4902 2 жыл бұрын

Thank you sir for the expert advice, I will take you're tips, great one's for a learning Diy'er like myself.👍🏻🇺🇲

@moreykowalenko583 Жыл бұрын

another amazing video. learned lots thank you

@stephenscott9837 2 жыл бұрын

Love your videos keep em coming and mini me is learning the ropes from you

@salvadorgutierrezr5914 2 жыл бұрын

Thank you for teaching 🙏 great video ✌️

@headshot8888 2 жыл бұрын

I just took a look at the same rust pit on my 05 King Ranch. I've got holes rusted through below the wire bundle. No damaged wires. It's rusting through from below. Likely from Salty tire spray as I just repaired the left side which was worse. So much for all those years of oil spray.

@jeffone2nv 2 жыл бұрын

Great content great fix you save the owner a lot of money 💰. Another technician 🧑‍🔧 wouldn’t have found the problem. Would have charged to replace the module. And still have the problem. Proper techniques result in a proper diagnosis. Therefore it can be fixed probably. I wish you had a shop here in Michigan.

@brucelott3583 2 жыл бұрын

I've been preaching this for years. I built a tester that lets me put from 2 to 12 amps on a circuit, plus direct battery connections to see if voltage drop is due to hot side or ground. It has been used a lot over the years. Good video

@watchdogu.s.a.8973 Жыл бұрын

Would you mind sharing how you built the tester?

@mikehenry4743 Жыл бұрын

I like how he said multiple times "this vehicle is very old," heck I still drive around my '69 Bronco and '74 High Boy.

@rugbyladice574 2 жыл бұрын

Thank you, great video.

@MarioDallaRiva 2 жыл бұрын

Bravo, Alex! 👏🏼

@richardjones3112 8 ай бұрын

Brilliant video!👍

@wayne-oo 2 жыл бұрын

Great job !

@ovalwingnut 2 жыл бұрын

Cleverly diagnosed and wonderfully repaired. Shame the Mfg's can't do a little something extra in those "repeat areas". Liquid sensors are as cheap as chips.. placing a few in the "common hot spots" would be fantastic. Funny, I don't think this vehicle is so old.. my bad. I gave up wanting anything from the 80's+ (having lived through it as the typical shade tree mech ;) Yes, things are much better now but it's burned into my brain. Thank you for the super videos. You [are] the "Vehicle Whisperer". Cheers!

@neverstoplearning382 2 жыл бұрын

Corrosion and heat creates resistance. Really cool video.

@reycardenas8092 2 жыл бұрын

Good information thanks

@markk3652 2 жыл бұрын

A+ job on this one!

@donngrimes6179 2 жыл бұрын

Excellent! Thank you!

@utahbones3094 2 жыл бұрын

Excellent job

@carlm2590 2 жыл бұрын

Thank you I loved this👍

@user-zz9bf9mh2k Жыл бұрын

Thank you for the video.

@Twobarpsi 2 жыл бұрын

Best Tech on the planet!!

@johnjones3816 2 жыл бұрын

Another great video good job

@jerradguillory7909 Жыл бұрын

Great video man!!! Great explanation when i work on my customers fords you always seem to have some good info i can use for those f word headaches 🧐😂

@timkis64 Жыл бұрын

very good explaination.

@rfbedell347 2 жыл бұрын

Excellent Video.

@09vrodz 2 жыл бұрын

Awesome video

@josephlundy3534 2 жыл бұрын

Great video 👍

@ggem8125 2 жыл бұрын

I am an electronics guy for a living I found this to be a great video. Dealing with mechanics for the maintenance of a 50 vehicle fleet basic electric principles seem to be not as common a skill as you would think.

@TonicofSonic 2 жыл бұрын

This motivates me to be proactive in protecting those wires anywhere I see risk of damage.

@TonicofSonic 2 жыл бұрын

Sure enough, mine had the same situation playing out. I even found a couple small holes directly below the wires where the cab rusted through. I managed to wrap the exposed wires which had not rubbed through yet with several rounds of tesa tape, then hit the holes with a metal body panel patch, threw some silicone gasket maker over that, then went over the top of it all with gorilla tape. 💪 Once that dries I am gonna go back and seal the bottom with either this liquid metal stuff I have or just more silicone gasket maker to make sure water will not get inside. Not trying to get crazy with bondo, the room is tight and the truck is old so good enough is good enough.

@samholdsworth420 2 жыл бұрын

So glad I live in San Diego and my 23 year old Chevy S10 Blazer doesn't have a lick of rust. The crusty wires in this truck definitely would not have made it with a salt bath

@TonicofSonic 2 жыл бұрын

@@samholdsworth420 I will never buy a used vehicle with rust again. The rusty vehicles in the rust belt markets sell for the same prices as no rust vehicles in other markets.