How a Basic Automotive Electrical Circuit Works
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- Опубліковано 7 тра 2020
- Today I wired a basic automotive electrical circuit. In this circuit, you'll see how the different components work together to make an accessory work. I explain the purpose of all the different parts and give tips on how to assemble them.
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16ga Primary Wire:
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In-line Fuse Holder:
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12V Momentary Switch:
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12V Rocker Switch:
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Universal 12V 5 Pin Relay:
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Wire Terminal Kit:
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Assorted Fuse Kit:
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Heat Shrink Tubing:
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Klein Tools Wire Crimper:
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Irwin Automatic Wire Stripper:
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Performance Tool Test Light:
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Due to factors beyond the control of NutsAndBoltsAuto, it cannot guarantee against unauthorized modifications or improper use of this information. NutsAndBoltsAuto assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. No information contained in this video shall create a guarantee, expressed or implied, of a particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not NutsAndBoltsAuto - Авто та транспорт
Here are some things you may need:
16ga Primary Wire:
amzn.to/3rw8RuO
In-line Fuse Holder:
amzn.to/3c6yw6M
12V Momentary Switch:
amzn.to/30pCsu6
12V Rocker Switch:
amzn.to/38klL7y
Universal 12V 5 Pin Relay:
amzn.to/30sA4Tr
Wire Terminal Kit:
amzn.to/3t2HZmM
Assorted Fuse Kit:
amzn.to/38j7xUr
Heat Shrink Tubing:
amzn.to/3v7hA91
Klein Tools Wire Crimper:
amzn.to/3cgcb6P
Irwin Automatic Wire Stripper:
amzn.to/3kY4Ixd
Performance Tool Test Light:
amzn.to/2PN01ek
great video. seems like you'd be the perfect source to answer a question for rewiring my fog lights into Daytime Running Lights. Currently, they don't get power with the ignition switch. Ok, so I'm supposed to use a Tap from a fuse that DOES get power with the ignition switch ON. That Tap adds a fuse for the new lead-out wire. So I pull the fog fuse from its current position to make way for the lead wire from the Tap.... Yes? ...but which side of the now-empty fogs fuse holder do I plug this new hot lead into? Hot shouldn't meet hot......right ?
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
Thanks! I'm glad this helped
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!
Super straight forward and clear explanation!
Very well done and informative. Thank you.
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
Glad I could help!
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 👊
Greatest explanation. Thank you!
Very informative and helpful!!!
Best explanation I’ve seen. Thank you.
Now I understand it. Great teacher.
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 🔥
very brilliant way for explaining car circuit and relay role.. really helping me understand
Excellent job. Thank you!
Fantastic video! I feel more confident already! Subscribed!
That was an excellent and informative video. I’m trying to learn more about wiring so I appreciate the help.
Glad it was helpful!
Nicely done!! Thank you
so well explained answered my questions. I always wondered if all excessories had relay amd a fuse but now I know.
Thanks! Very concise.
Great Video! Many Thanks!!!!!!!!
Very well done. Thank you for doing it.
I appreciate the knowledge Sir.
That is a very good video. Thank you.
Awesome explaining thanks
Thanks for the help!
That's a great explanation, thanks!
Excellent explanation!
Excellent tutorial.
Very good explanation and reminder for those of us who need a refresher. Thanks.
Very nice explanation - I learned a lot
Best one bro.. This helped me a lot thank you.
Great job 👍🏾
Got it... finally, thank you 🙏
Excellent explanation
Thanks bro it was so simple
excellent explanation
Thank you so much , I like this topic
Amazing video man
Great explanation thanks please make more videos similar to this
Good explenation 👏👏👏👍👍👍
finally i understood it. thank you
Welldone bro👍
Best and simple explanation. God bless. You have the art of training.😊💐👍
Thanks and welcome
Thank you so much man❤️
Awesome video
Nice n informative.
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!!!!
That is not correct.
A mechanical relay is a simple device. It has an electromagnet (coil of wire wrapped around a ferrite core), and a set of mechanical contacts. The coil is connected to the switch. When you turn the switch on it applies voltage to the coil and that's all. The coil draws very little current. The coil is an electromagnet and pulls the mechanical contacts closed or open (depends of the design configuration of the really). There is no diode. The contacts have a much higher current capacity. Those contacts are connected to the load (lights, motors etc). Just as the video indicated. That allows you to switch higher current devices with a low current switch. A mechanical relay is not a diode.
Now that said, flyback diodes or resistors are sometimes used across the coil of a relay to prevent voltage spikes (transients) from damaging components or creating noise in the entire electrical system. But it's not really a basic function of the relay itself. It works the same with or without.
Thank you
GOOD VIDEO
gracias tuercas y tornillos!
Very good👍👍👍👍❤
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.
Thanks for the advice, it's very much appreciated. I do have follow up videos planned. Hopefully it all works out :D thanks again for watching 👍
@@NutsandBoltsAuto Another Ken who appreciates your teaching. This was pitched just at the right level for me, filled a lot of gaps in my auto electrics understanding.
Thanks
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.
Hi, simplicity and explanation is quite interesting. Can you share power distribution in car?
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?
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
Great video how old are you ? You sound like you have a good understanding of it already !
Watching
From
Kenya +254
Good evening can this setup be used with can bus wiring
Can you tell us what numbers are the cables hooks too
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?
Sounds like you understand!
I think all electrical car accessory will ground through the body of the car? but I'm not sure
What pin on the relay does that red wire connect to normally?
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?
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?
I’m trying to figure out a wiring issue in my s10, looks like I’m going back to the basics
Is the relay must be grounded ?
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
👍👍👍👍👍
About time you uploaded a new video 😒
bruh off
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?
Thanks dude. Why is it necessary to have the red wire? What would be an example of where it would go to?
The red wire (coming from 87a) isn't necessary unless you wanted an alternate circuit. It is also useful if you want a normally closed circuit instead (light on when switch is off, for example). For most applications, you would remove it or use a 4 pin relay instead.
If we want to add load and doing wiring,does we need to unplage the batt terminal first?
General rule of thumb when doing any electrical work is to disconnect the battery. This is to reduce the chance of an accidental short while working on the system.
Can you make one for motorcycles please?
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...
Lil Bubba 👌
What’s “a significant amount of current”, please?
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.
Explica eso mismo pero en español
How,If you put the switch on the ground side it will be staying on?can you please explain?
You can put the switch on either side of the circuit. I was just giving an example of one kind of failure.
Most people would put the switch on the positive side. Computers usually control grounds. It just depends on circuit design and what you plan to do with it.
if you put the switch on the ground side you essentially have voltage on the entire circuit up to the switch. If a wire anywhere up to the switch shorts to ground, then the circuit will be continuously on and not affect the fuse . If you place the switch on the positive side of the circuit, then any short to ground on the positive side will blow the fuse.
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.
where is the signal lamp connect
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 -
W
Fak dude just get to it! Damn
He's wrong on one important fundamental statement
Talks too much
Thank you