In the last century, we had 8-pin relays. They were effectively double pole, single throw switches. Pin 1 was ALWAYS switched power to the coil. Pin 8 was always ground. Pin3 and 6 were always the common betwen the switched contacts 2/4 or 5/7. A diode was connected in reverse across the coil to short the back EMF to ground. Now they changed the standard.
hey thank you for this. i used a generic flasher relay for my vintage moped the oem one i couldn’t find exept from overseas and i needed my moped blinkers to work asap. this video helped me figure out what wire when where off the plug on the scooter that went to the oem flasher
i understand how the relay is wired... but i want to know how they decided to use 85,86,87, and 30 as the numbers for basically every relay on the globe.. seem like such arbitrary selections
87 is energized when relay is energized, 87a is energized when relay is not energized, if you want the relay to be NC use 87a and powering the relay will kill the circuit, if you want NO use 87 and powering the relay will power the device
![How To Test and Diagnose Relays and Wiring [4 & 5 Pin]](http://i.ytimg.com/vi/S-DwV0HLsE4/mqdefault.jpg)
![How To Test and Diagnose Relays and Wiring [4 & 5 Pin]](/img/tr.png)
Your explanation is the best ever..So simple, short and straight forward. I am from Ghana and love to do DIY everytime. Thank you
Thank you very much for support...
In the last century, we had 8-pin relays. They were effectively double pole, single throw switches. Pin 1 was ALWAYS switched power to the coil. Pin 8 was always ground. Pin3 and 6 were always the common betwen the switched contacts 2/4 or 5/7. A diode was connected in reverse across the coil to short the back EMF to ground. Now they changed the standard.
Hi bro. There is one more number close to 30.. B2 or B4 like that. What is that number.. Thanks 🙏🙏
hey thank you for this. i used a generic flasher relay for my vintage moped the oem one i couldn’t find exept from overseas and i needed my moped blinkers to work asap. this video helped me figure out what wire when where off the plug on the scooter that went to the oem flasher
Glad I could help...
i understand how the relay is wired... but i want to know how they decided to use 85,86,87, and 30 as the numbers for basically every relay on the globe.. seem like such arbitrary selections
So how can we select 87 or 87a. When 85 and 86 are energized 30 and 87 are closed circuit. I mean how to choose the low and the high one
87 is energized when relay is energized, 87a is energized when relay is not energized, if you want the relay to be NC use 87a and powering the relay will kill the circuit, if you want NO use 87 and powering the relay will power the device
Thank you bro
Any time, thank you for support...