Basic Relay diagram - IOW what goes where
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- Опубликовано: 13 сен 2024
- A few people have asked what gets connected to the different connectors on a relay.
Well, since I had an idea, but wasnt 100% sure, I did some reading and decided to do a quick vid.
I hope it helps.
AH
p.s. double check to make sure
;)
P.S. for those that are wondering where I got the support info for this, check out these links...
www.offroaders....
www3.telus.net/...
I'm sure there are more and that there is more than one way to skin a cat.
FINALLY! Someone made a video that can explain the wiring to a kindergartner like myself. this wire goes here, this wire goes there etc. thank you for this video! I now understand how the relay works.
I think the 5 pin relay has a 87a,and its the same as the # 30
Thank you so much, after watching several videos on these I was able to wire the radiator cooling fan on my Ford Focus mk2,u helped saving my engine
Thanks for being, quick, clear and straight to the point!
Wow! That's great!
YES! Exactly what I was talking about on the last vid. For some reason in your last install vid I thought you had hooked the switch up between the positve terminal on the battery and the #30 on the relay, which could kill the switch. Hey, I have found the "Add-a-Circuit" at my local Auto Parts to be GREAT! They plug right into your fuse box, and have a wire lead that you can wire to the switch then the #86. Simply plug the existing 10A fuse back into it, and WALLAH! Use ACCESSORY line & fuse
Good video well explained. I don't know what HHO is but its the same as device/accessory.
FYI: Lots of videos about wiring relay connections vary in two ways. Keep in mind that 80 & 37 could be reversed hook-up and 85 & 87 could be reversed hook-up too. IE: 87 could go to positive battery and 30 could go to the HHO cell/device....86 could go to ground and 85 to the switch.
Thanks! Using your video I was able to get the fog lights fixed on my motorcycle. Previous owner hooked up the red fused 12V wire going to “30” on the relay to the negative terminal of the battery!
The relays with the 5th connector is like a single pole double pole switch. The other terminal is a normally closed position and when activated will shut off when the other one turns on. They are very handy if you want power sources to a load from two different power sources or if you want power applied to one load and switched to a second load when activated. OR if you want something on all the time and shut off when activated (usually safety circuits)the relay is just a mechanical switch
The fifth connector or terminal on a relay buddy (track 2:29), is the "Normally-Close" terminal of terminal-87, means while the switch on your diagram is OFF, then its connected or closed-in at that fifth terminal or the center terminal which is also called the 87-A, or simply "Normally-Close".
The fourth post (87) is "normally open" and the fifth post (87A) is "normally closed". Meaning that 87 will be "off" until you energize the coil (85 and 86 posts) and 87A will always be "on" until you energize the coil.
Excellent video, Quick, Simple and to the Point. 👏👏👏👏 Good Job 👍
The 5-pin relay that you are referring to has both a Normally Open (N.O.) and Normally Closed (N.C.) contacts. These are know as N.O. (87) and N.C. (87a).
Yes...
Who cell what's ice for is it agas
I understand how a relay works now , thanks so much ,well done.
Great video. I don't know why other people have 20 min videos to explain the same thing.
Great video... best yet ..easy to understand...
I have a comment in that I too run fused power to post 30 and post 87 goes to my device. What I do differently, is I run a jump wire from 30 to 86. So instead of having a hot wire at my dash and running to post 87 I run a ground wire from post 86 to a toggle switch at my dash where it's grounded on the other side of the toggle switch. This way if there's a short in the wire running from the relay to the dash the only thing that will happen is that the device will turn on through the relay. It also saves half the distance of wire needed to run from the relay and back to the relay.
The 5th contact is 87A. When there is no power on the switch circuit, the voltage from the battery is output through that pin. When you apply voltage across the switch circuit, the voltage from the battery is output through pin 87
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87a is a constant on till 87 is made. Then it is off. I use it to run a switchback LED. 87a is for the white LED and then 87 is for the Amber/Red LED. In turn it alternates from white to color as needed.
Also I have run across some 5 Pin relays that had 2x "87" pins, that are not 87 and 87a. When I metered them they were both 87 terminals. I guess like for running headlights from the same electrical connection but different terminals. This is another case why its important to know how to use your VOM/DVM.
You are correct sir. 2x87.... for your headlights.
the 5th connector is 87A and here is how it works. when the relay in not magnetically energized, the 30 and 87A are connected. when the relay is energized, the 30 and 87 are connected. you can use it in multiple functions like powering up 2 different loads or sending positive to a wire when energized and ground when not,etc etc etc.
@ELCHACHALAKO
The HHo he is referring to is a hydrogen producing cell. It is commonly used when people want to obtain better gas mileage in their vehicle. Nevermind the HHo part its basically just the main output for the relay.
there are Relays which have pin 87a and 87. 87a is the exit line when 85 & 86 is not active. means 30 runs through 87a.
if 85 & 86 activate the Relay then 30 runs through 87.
87a is the exit line 1
87 is the exit line 2
exit line 1 is active when relay switch is powerless (85 & 86) have no flow.
exit line 2 active when relay switch have power (85 & 86) have flow.
excellent summary
Easiest explanation ever.
The fifth pin will stay hot , such as a headlight scenario . 87 switches on / off for high beams . The 5th pin 87a would power up after you shut your high beam off and is ran from a daytime running light
The 5th in the center /for a relay with 5 connectors is for will say 3 way switch / you could hook that up to your reverse light wire when you put vehicle in reverse will activate relay from that point. Without flipping other switch to activate whatever you have on that relay.
very helpful man. I'm such a visual learner and this really helped big time. Thanks!!
To answer the question in the video, the fifth connector on a relay is just another output in parallel to 87 that would go to the HHO system. it is located in the center of all the other connectors. I am talking about aftermarket relays as each auto manufacture has there own design and pinout.
5th connector:
- 87a live by default ... a grounded LED on it would stay on all the time, unless the Relay is activated, then it would go off as 87 becomes the new current path in the high circuit.
- or a second 87 that you can use to power up 2 items like 2 headlights High Beams
wow this really helped. I'm such a visual learner and boy did this help. Anyway you could explain the purpose of the relay? I know it converts a small circuit into a big one but i just don't really understand that I guess..
power flows from 30 to 87 in its normal state, when 86 and 85 energize the coil 30 then switches to 87a from 87. 87a is the 5th connector,in the center of the coil.
hi, the diagram that is shown here is different from i found online, for example, wire pin 85 of relay to 12v supply
wire pin 86 to good ground
wire pin 30 to battery
wire pin 87 to HHO Cell
Thank you...concise and simplistic. Solved my issue
Fixed my Ford focus, bad relay, you rock,Thanks.....................
The 87a pin on these relays can, in simple terms, be connected to a load (lamp etc) that should be operational normally but is turned off when the switch is thrown to the ON position... as opposed to pin 87 which becomes energised when the switch is thrown on !
Like a 2-way switch in effect.
My hydrogen cell is powered from my car ignition circuit for safety, which powers the engines oil pressure lamp...but the system only operates when my oil-pressure light goes OFF. (engine running and pressure ok)
Now do you guys get it ?
I installed a 5 connector relay. The purpose of the 5th connection in my case was to connect to a second (or twin horn). It was labelled 87 (2 87 connectors).
very simple and informative
Thanks man it's really helpful video for me.
87A is always powered when the relay is not in use - so it could be a low beam light for example - then when you energize the relay 87A closes and 87 is powered and could turn on high beams instead.
Can't have it both ways: 87a opens when relay coil energizes - it' serves up a normally closed contact..
87A normally connected when no power and ground to the coil, for me I used 87a for auto cut off when engine stall , if the terminal 85 connected with oil pressure switch relay should open when energy to the coil and reconnect when engine running
the relay is 20, 30, or 40 amps? and the fuse is 20, 30 or 40 amos? the switch is necesary?
i am making a hho generator for hidrogen to the truck, and this is very interesting, easy to follow....the conections...
thanks
chavoya123
pin 30 is powered from the battery. pin 86 is powered from a switch. How come two power sources??
you have no power going to youre coil...86 & 87...what energizes coil?...also you wanted to know what the A post was for.. its to turn whatever youre turning on..off..if you wire it that way...
Very good tutorial. Thank you Sir
You were doing good until you assumed everybody knows what an HHO Cell is. Back to searching....
i said the same shit 😂😂😂
it can be any device like fog lights
Thanks a lot for the helpful info. Great video.
It's such a hodge-podge, this old numbering system: pretty much makes no sense. I am not usually a EuroNorm fan, but EN 50005 applies numbering that makes more sense PLUS... coil gets designated A1 and A2 - can't miss it.
thanks you made it simple to understand
Steve, it'd be real helpful if you did a demonstration of the actual parts being or have the connected parts displayed on a table all laid out. I just bought a HHO kit and am kinda confused about the relay connection to the on/off switch - isn't there supposed to be a complete circuit instead of a 1 wire connection to the on/off switch?
So nice
Thanks, very informative!
Très bien illustré pour le même projet HHO ! Merci ! ;-)
excelllant explanation and good diagram
THANKS FOR THE ANSWER,,,just to make sure IM ON TRACK GUYS
Thank So much.
From Colombia.
Regards.!
5th connection would be 86a ,which would basically be in an on state ,when there is no connection between 85 and 86. causing 87 to an open circuit. so anytime 87 is open 86a will be a closed circuit and vice versa.
sorry not 86a,but 87a . i was rushing
best teacher
Damm that was easy! Thank you
Para mi es una excelente forma de aprender algo nuevo Gracias por la informacion
That was pretty damn good .
the fifth gets power when all are off. so say as an ex when you shut lights off connected to relay the fifth would be a nightlight that comes on as soon as everything goes off. or an alarm after radio is off car is off alarm is energized
Well thanks for the video is really good I have cuestion do you have any idea how can fine a short circuit in my car? Thanks for you help
i have seen videos where 30 goes to pos. wire to lights,, 87 to pos. of battery,, 85 ground,,86 switch. but i have my lights like in your video. and in some videos 87A turns something on when you turn off switch and another video 87 and 87A is for each light rather than both lights on 87.... i`m more confused from watching all these videos, could you explain in a easy way please.
I am a semi retired electronic tech.. I have a few cars that I have to keep going. This is one of the few sites that give common sense explanation of the workings of this standard spdt relay.. if I understand this power 12 volts is on 30 which is useless until the relay is grounded by the computer.. I think that initially the fuel pump on Ford 150 circa 1999 is primed and controlled by this pin. is that true.. also would it be ok to post a in-depth troubleshooting I am working out on my 99 expy. I don't want to and refuse to just throw parts at a truck just because I was too lazy to understand a circuit.
Thanks that's amazing videos channel I like it
Great - good explanation and diagram
so then does the other part of the switch go to ground?
this question is actually apart from relay system..its about the hho system...i wanna ask that where does the negative terminal of the hho connected to?
The 87A is for a single cooling fan and the 87B is just for dual fan
my writeup for wiring parking lights show that the ground would be the 30 how does that work If you just said that the ground is the power source?
Great explanation, but I just bought relays from Amazon and the pin #'s are # 1 Blk, #2 Blu, # 3 Red, # 4 Wht. I don't know it the colors mean anything, or do I go by the numbers. Do you know how theses are wired up. I am lost.
Thanks.
Short & Sweet.
what is the best way to test the main relay in diesel truck because the truck did not start cranking only
excelente dude! This help me a lot.. Nice work. thanks :)
colors man, colors and numbers will help.
isn't the extra connector for low and high beams if you are working on headlights?
I bought a wolo horn for my vehicle, i installed one on my jeep with no relay. but with the one i got i decided to have a switch for it which has a relay with it. now what sort of fuse can i use and where can i find it? thanks
maybe is off topic but I have a truck that uses 24v battery and a circuit to cut power that we send via a avl (automotive vehicle locator) , we succeded to make a circuit for a 12v battery car, what we wonder if we use a 24v relay 1.-does the circuit and wiring of cables has to be the same? 2.-the battery are 60 amps, and the relay that we want to use is 30 amps is this ok, sorry for my english
if the guage of wire u use wont carry 30 amps,that 30 amp relay is gona melt wires for sure.secondly,wont the relay trip at 30,and never let the 60 amps flow anyway?
so can you flip 85 and 86 from power to ground or the opposite
i see other relays 85 is positive and 86 is ground, so as long there is circuit between 85 and 86 that should make and 30 and 87 in contact and deliver the power, right?!
so if i put a switch do i have to connect it to the ignition . or can only have 1 terminal for relay
Power lead ? ,that's neg side right ?
I'm having problems finding a relay, everywhere I've gone they try to give me a fusible link. Do you know where I would be able to pick one up and how much?
Can you spice a ground triggerin between the switch and the pin number 86???? Im asking because i want to know if its possible to bypass the switch if i forget to turn it on with the system.
Great video!!
hey, do know a guy name Greg who does the superstorm cells? whatever happened to him, all his videos disappeared.. latest vid i saw him doing was something about making easy money online.. did he get booked or something? weird..
i have 5 places that have the male tab type terminals...what does the center tab doo?
Ran out of characters. the terminals are usually called 87 and 87a a being the normally closed. Polarity is not a problem on 87, 87a to 30. SOMETIMES a relay has a built in anti surge diode on the activating coil to protect computers and solid state devices so polarity IS essential on them. So 87(a) or 30 can be the hot lead, its a mechanical switch and it makes no difference. I see computer input circuits that are "backward" from normal because the computer is looking for a ground input.
The fifth pin is for the alarm systerm
Incorrect, the 5th pin (87A) has power at it (supplied by pin 30) when the relay is NOT energized using pins 86 (+) and pin 85 (-)
Yes 87a is for led to no that your system is working
87 x 2 outlets = 2 x power outlets from relay,FOR CONNECTING ,for example 2 X SPOTLIGHTS.
hi. i need some help... please... i,m working on a 1985 suzuki bike, trying to conect the cooling fan and get it to work with the temperature switch,, everything is brand new, i have try so many dif ways and is not working. the temperature switch has two pin.... please help....
Good evening sir
the center post or 87A is an off
hello! I have a relay Siemens 72HV603 and need to know how I make a test to this relay and to know how i can repair. thanks
Thank you.
How do I trace the ignition wire?
Regards.
So if I want to add an electric fan to the diagram where would I add it? Also do I need a relay to do a toggle switch fan?
yes, or the switch will get real hot.
Hot power wife from fan connects with 87. Ground wire from fan goes to ground.
what is an HHO? I have a train horn kit that came with a 12v compressor, 2 horns, nuts/bolts and the tubing that goes to compressor and horns and a relay.... it has the same relay thats in the vid... how do i install it in a 2002 hyundai elantra gls
that's ok, i need the full lectures.
Hello can 85&86 be connected to a 2 pin switch
there should be a protective diode between 30 and 85...other wise you will DAMNage it!
Good information sir
could i use any relay to make a few LEDs flash?
so if i dont use a switch would the ignition act as the switch.. In other words if im using the relay for a fan then the fan will always run while the ignition is on?
Yes