How a Basic Automotive Electrical Circuit Works 

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Well done ! No loud and insane music. No shaky images, poor lighting and confusing setup. Straight to the point, with a diagram to top it up. It doesn't get clearer than that. Thank you very much!

Finally a basic instruction of how a relay works, their purpose and how they are wired. Thank you so much!

Best tutorial I've ever come across, and I've been through lots rewiring my truck. You the man ! Thanks for passing the knowledge

Great video for beginners. You are an excellent teacher. Thank you.

Outstanding explanation of how a relay works by the presenter. I played this back three time and thoroughly understood every aspect. Thank you. JC

You did an excellent job explaining the electrical. Thank you for posting!

Bro this was super handy!!! I’m wanting to learn a bit more about car electrics and this definitely helped me understand a few things

Super straight forward and clear explanation!

Very good explanation and reminder for those of us who need a refresher. Thanks.

Huge help for me and for most i think so, really appreciate this basic diagram and presentation specially for me as a beginner in doing electrcal car stuffs. Keep it up bro 👊

Very well done and informative. Thank you.

very brilliant way for explaining car circuit and relay role.. really helping me understand

so well explained answered my questions. I always wondered if all excessories had relay amd a fuse but now I know.

Excellent explanation of something we have all wondered about at some point in our lives. Well done! Should save many cars from going up in 🔥

That was an excellent and informative video. I’m trying to learn more about wiring so I appreciate the help.

Best explanation I’ve seen. Thank you.

Excellent tutorial.

Fantastic video! I feel more confident already! Subscribed!

Greatest explanation. Thank you!

HOW A RELAY WORKS: It uses a smaller amount of electric to open the relay switch or (diode) to complete the circuit. *reason why: power straight to the switch will burn out or catch fire even with a fuse* The relay bypasses the switch to take the load off it. So, power in to an inline fuse, into the relay, power goes through a resister and create a magnetic field that opens the diode. I believe I have that part correct. Then from there the rest is the same. ****edit****. Awesome video!!!!

Very informative and helpful!!!

Excellent job. Thank you!

Now I understand it. Great teacher.

Nicely done!! Thank you

Thanks! Very concise.

Thanks for the help!

Very well done. Thank you for doing it.

Great Video! Many Thanks!!!!!!!!

I appreciate the knowledge Sir.

Very nice explanation - I learned a lot

That's a great explanation, thanks!

Excellent explanation!

Awesome explaining thanks

Great content! Excellent electrical theory. I would like to see a followup video on the practical side. In other words if I were to build that exact circuit in my car, what wires, connectors, etc would I use, and how would I route and connect them to do it properly. Do I need to solder? Do I need a special crimp tool. Could include Amazon affiliate links to the stuff you used.

Great job 👍🏾

Best and simple explanation. God bless. You have the art of training.😊💐👍

Got it... finally, thank you 🙏

Excellent explanation

That is a very good video. Thank you.

excellent explanation

Best one bro.. This helped me a lot thank you.

Amazing video man

Thank you so much , I like this topic

Blue wire (from battery to relay): This wire typically carries positive current from the battery to the relay. The relay is an electric switch that is activated when it receives an electrical signal. In your case, the blue wire goes to the relay to activate or control a function, such as starting the engine or operating other electrical devices. Black wire (from battery to switch): The black wire usually indicates negative current or ground. In your case, the black wire goes from the battery to the switch, meaning it carries current to the switch used to control electrical devices. White wire (from switch to relay): The white wire typically carries a control signal from the switch to the relay. When the switch is activated, an electrical signal is sent via the white wire to the relay to activate it and allow or prevent current flow to the consumer. Red wire (from relay): If the red wire doesn't go anywhere from the relay, it might be a spare wire or intended for another function that hasn't been implemented. In some installations, a red wire is used as an additional output for current to other electrical devices. Black wire (from relay to ground): This black wire usually serves as ground or the return path for current from the relay to the ground or the negative terminal of the battery. This ensures that the electrical current has a closed loop for return, enabling the proper functioning of the electrical system. Is this correct? Thank you for your answ.

Thanks bro it was so simple

Welldone bro👍

Great explanation thanks please make more videos similar to this

Thank you so much man❤️

Good explenation 👏👏👏👍👍👍

finally i understood it. thank you

Awesome video

Nice n informative.

Thank you

gracias tuercas y tornillos!

Very good👍👍👍👍❤

Hi, simplicity and explanation is quite interesting. Can you share power distribution in car?

Thanks

GOOD VIDEO

Watching From Kenya +254

Thank you man!! I wanna wire a few lights in my Tacoma (bed lights, under hood lights, back lights, and also a cb radio) and I’m no professional Now question is, how many circuits can a relay run?

Great video how old are you ? You sound like you have a good understanding of it already !

Hi there. I recently changed the ecu and both control unit/ fuse boxes in the engine bay and boot/trunk. After doing this my interior fan does not work on speed 1 to 4. Can I hot wire it to a on of switch to bypass the 1 to 4 knob so it's a on or off. Thanks

nice video but if you put the fuse in the begining of the ciruit or at the end it would not matter because if the fuse cut off it will make it open circuit

A few questions, does anything come off the alternator? Or is it strictly for charging? So does everything go from battery to fuse box-fuse box to switch-switch to application?

Excellent approach for beginner like me. Can you explain to me about the ground? From your explanation ground generality the negative terminal that return to negative part of battery. For multiple negative wires, those wires will be connected to body of car, and the body will have connection to the battery. Do you think I grasp the knowledge? If yes, which part of the car have such connection?

Any idea how a bi-directional scan tool would control the example circuit in this video? I see people control electrical components in their car in videos, but I don't see how the computer would send such a signal. Are there extra wires coming from the computer that we don't see in an archetypical circuit like this?

Lil Bubba 👌

I’m trying to figure out a wiring issue in my s10, looks like I’m going back to the basics

Good evening can this setup be used with can bus wiring

What pin on the relay does that red wire connect to normally?

If I understand correctly the relay switch both break and join circuits. Why does a circuit have a relay after the switch if the switch can do what the relay (switch) does?

Can you tell us what numbers are the cables hooks too

About time you uploaded a new video 😒

Does really every single device need a relay? For example aftermarket power windows, door locks, stereo, fuel pump, radiator fan. Some of the devices cant they just come from a fuse box wich is feeded by a thick wire from the battery, but before the fuse box is a manual switch which you turn on off when driving/parking?

I have a problem with my Honda jazz..Relays and fuses are good..But no heater..The problem comes from the two oxgen sensors...

👍👍👍👍👍

If we want to add load and doing wiring,does we need to unplage the batt terminal first?

Thanks dude. Why is it necessary to have the red wire? What would be an example of where it would go to?

Can you make one for motorcycles please?

Is the relay must be grounded ?

Isn’t it better to use the negative to activate the relay instead of the active? I’m sure most modern cars use this method.

Why would your circuit shown need a relay. Surely the switch you used is rated for the load fuse in your example. A relay is used for lower amp switches. It must have a lower fused circuit feeding it. Don’t burn down your ride.

What’s “a significant amount of current”, please?

How,If you put the switch on the ground side it will be staying on?can you please explain?

I'm confused ? " If " the fuse was on the Batt GND and it blew - The load will stay on - until it kills the battery ???? If the Batt - GND wire is disconnected - that breaks the circuit and the Load would be "Off" ? I think to reason for the Fuse / Breaker to be in the Hot-side - "Is to Stop the power" from burning-up the wiring... You can run a negative ground circuit, but the fuse would still be in the Hot side... I may be wrong -

where is the signal lamp connect

Explica eso mismo pero en español

W

Fak dude just get to it! Damn

He's wrong on one important fundamental statement

Talks too much

Thank you