Yes, I have seen when you look at the fuse it is connected, but when checking with OHM meter, it is open.

@@daviddubeck2436 Or checking for 12V power and it lights up so you figure all is good. Then check with a meter to find only 6V at 1 amp. A crap connection will turn on a test light but not a pump.

Lol!!! OMG that's sooo true.

Each fuse in the car usually controls multiple things. When you're troubleshooting look at what else is on that fuse. If one thing that's on the fuse is working it's not the fuse.

Cars never originally had all this crap.

😂😂😂😂

My 88 F250 has those awful things.

You mean the genie

​@@bryanmercado8755 He does mean "smoke." AvE

Lol

@@f.demascio1857 Lucas Electrics Service Item 530433 😂

@@bryanmercado8755 rub the electrons the wrong way (by jumpering a car backwards) and the genie turns into an evil genie and makes random fuses pop. 😆

That's pretty smart!, thanks for the advice😊

Brilliant idea. 🚗

That's a good idea!

The circuit breaker is a good idea, could have used that when I was troubleshooting why the fuse for the rear wiper and power mirrors kept blowing (turned out one of the wire for the rear wiper is probably shorted to ground somewhere). After going through a few fuses I decided to use a small lab power supply instead, since those are current limited, but that was not ideal 😅

What @mod_incllc3235 said 😁😁

Odds are the owner was an older person and went to a home or had a slow health decline. Their possessions usually sit untouched or cared for and slowly begin to decline. Thieves show up and start destroying as they do. Family finally decides to do something about it or the owner reaches a point where they sell off, die, etc. The growth on the paint is two years of being in the weather/ pollen / under small trees like a dogwood so likely a covid death. Adding in you only see corrosion like that on the large aluminum parts if the vehicle spends a few months sitting over wet ground.

And while you are at it, add *multiple* sets of fuses, so that you do not need to stick 30A in 8A slots "just for now".

@@orangmakan For real. Now those big fuses? If the local dealer or the auto parts store sells them then buy as needed--they are more expensive and there are all manner of them, so no point stocking something you may never use. But all the traditional fuses are cheap, you just need to find the 3 or 4 fuse sizes with the most common current ratings. Toyota loves their teeny tiny fuses. OH and a metal fuse puller is a smart investment. Those plastic ones turn brittle in the heat over time.

@@docferringer Every manufacturer loves their little tiny fuses these days..... My old 92 Corsica had normal automotive bus fuses, 2000 Malibu minis on some incidentals (radio, accessories, interior lights, power mirrors, etc) and normals on the important stuff, but 2008 f-150, 2007 optima, 2007 versa minis.....minis everywhere.... They cant convince me some accountant sticking their nose in engineering isnt a thing when its obvious a conversation ala 'we can save 3 cents per annum if we use these instead of those' (and presented on a graph where the y axis is undefined so they can make that upward line as big as they want) definitely happened...... That being said those freaking cartridge blocks are some BULLSHIT!!! Whats wrong with a maxi? or a breaker?! FFS that kind of stuff turns me off to brand quicker than anything else..... And side note for the home gamers out there: there is nothing inherently wrong with using a larger fuse for testing.....provided you know what you're doing. Yes, you can have a minor short pulling a bit too much current, which pops a 10A but not a 25A, and that can melt stuff, cause a fire, etc (also why a multimeter with a decent amps range is a good idea, or the aforementioned clamp meter, though for DC Id worry about the EMI in the average vehicle screwing with it). If its a dead short, itll blow the 25A too, which is information you can use for more troubleshooting. Its when it doesnt blow you need to be on your toes. Also, NEVER EVER RUN A HOTTER FUSE THAT DESIGNED!!!!! No, not even 'its only 5A more....' THAT IS ENOUGH TO BURN YOUR CAR DOWN! Its 'okay' (for those who know what they're doing) for troubleshooting, maybe even getting back to some form of civilization. But it is never acceptable. Ever. Even doing it for testing is bad, which is why mechanics dont let other mechanics see them do it.....its embarassing.....as it should be. Take one out of something you dont need (radio, turn signals, seat heaters, rear glass heater, door chime, whatever) BUT DONT RUN MIS-SIZED FUSES!!!!! EVER!!!! When it goes bad, AND IT WILL GO BAD, we will all laugh at you. All of us. And we will tell others what you did and why it was stupid so they can laugh at you too. So dont do it. Oh, and put fuses back in the little extra space holders when you use them dammit. If there are unused and unwired slots, fill em with backups. And still keep a little yellow slide pack in the glove box. Its not hard. There is no excuse. In fact, if your next tab is an amazon order, add a pack or two to your order.....do it. Now.

Thanks for the sub & watching the channel. I appreciate you! Keep wrenching 🔧

couldn't agree more. Makes diags like this less difficult and often much faster.

A good point. Incandescent and LED test lights put different loads on a circuit. Using a faithful old incandescent test light can actually blow some modern electronic parts.

came to the comment section to say the same thing

The SCR in the alternator regulator diode trio was shorted out, it often happens on those oriental car brands. They get a generic size replacement battery with the connector posts on the wrong sides and think it fits without looking at the pole marks. Edit to add: Most American cars have a fuse link on the alternator to save it from cross jumping mishaps and will just roach the alternator cable.

Areed. I would have had several fuse holders in there with maxi-fuses to replace that POS bodge fuse assembly.

I agree. Most other guys I watch, they show the resolution. It’s almost like having closure seeing the vehicle run at the end. It may take several days and some editing, but having the complete repair wouldn’t give me this cliff hanger feeling.

​

Oh Canada! Thank you for your kind words. I appreciate you watching. Keep wrenching 🔧

Too much reverse bias current. Never good.

I'm not necessarily disagreeing, but those diodes normally deal with more than 12 volts when rectifying the three phase AC made in the stator, so I don't see why 12-13 volts from an attempted backwards jump start. Don't say "more amps" or "current", as the diode is essentially an open circuit when reverse biased, which means no current, whatever may be available from the battery. I won't try jumping backwards on my car to test, though....

Why not?

Simply adding a diode in the Vcc or B+ in the design would solve most of the problems. The ECM's and other devices often fail because a diode in the circuitry is in revers bias on the power input and when it sees reverse current it goes dead short. CB radios used to do that. If you get a shorted CB is the protection diode in the back of the radio. Same with an ECM but they are potted with epoxy and cannot be repaired in most cases. If the manufacturers would just put in protection diodes in series with the electronics, all this BS can be eliminated. I did that on my big pickup I used to have and jump started people all the time and my electronics in the truck was WELL protected.

Noticed that too

Good catch! I missed that!

In 2008 my neighbor asked for a jump start for her newish Rav4? and I hooked the cables backwards on her battery then corrected the mistake. Car started but only idled - step on gas pedal did nothing. My excuse? My neighbor's Krazy hot body and skin tight jeans distracted me to the point where I mixed up red & black.

Buddies ex had a car he got painted, so they stripped them thing. A couple months later they started putting the thing back together... It wouldn't start. Ford focus, there's a fuse on the backside of the fuse block under the dash. Just 1, and it was blown. I think it was something to do with the airbag system that would blow and cut power to the fuel system in case of an accident. They obviously disturbed the system when taking it apart.

Same on 2008 Lexus, one would think that Toyota would make the battery cables colored (like Red for positive and Green for negative. Its a dam shame, one spends 70000 for a car where one has to almost ques the polarity for buster hook up! I did take care of my battery leads after the same fiasco on LS460

@@pcofranc ????

chasing an electrical problem gets crazy. Sometimes the customer gets mad because it takes 3 hours to figure out an electrical issue & do the repair. Thanks for sharing your stories. I enjoy reading them. Keep wrenching 🔧