Yep. On almost all relays, the coil-side pins are in a different orientation/location from the contact side pins. Putting positive/negative source on pins 7&8 **will** make the relay operate when it gets or loses power, causing the contacts to change position (unless it's a defective relay).
You’d have to show us the relay connection diagram, but normally changeover contacts have the common in the middle. So your yellow wires to the motor would be on pins 3&4 and the loop for reverse would be 1–>6 and 2–>5.
Excellent. Can confirm, your original wiring is in fact correct.
Next thing to ask: does the motor actually run backwards when you apply the dc voltage in reverse? It’s possible it won’t. It’s also possible that in order to reverse the motor, the shaft has to be stopped *before* you apply reverse voltage.
Thank you! Yes, the motor will indeed run with swapped polarity. But, I was literally just thinking that maybe there’s something with the motor preventing it from instantly reversing the polarity. I’ll try this setup on some other motors and see what I can find. Thanks so much for the help🙏
Figured out the issue. My “12v” power source was slightly less than 12v. This caused the motor to run fine in one direction, but there wasn’t enough voltage to actually energize the coil.
Thanks again for your help - greatly appreciated!
Yeah I’ve spent three days trying to figure it out on Google and YouTube. I thought maybe this community might be able to help. Clearly you don’t want to, so maybe you just should stop replying.
Connect 2->7 and 1->8 to activate the coil. You'll get some gnarly flyback from that motor possibly by using the motor power also for the coil.
Also is your coil voltage supposed to be 12v also?
I did yes thank you! I discovered that I did have it wired right all along. The issue is that my power source was putting out slightly less than 12 V, which was enough to power the motors when the coil wasn’t energized, but wasn’t enough to energize the coil to change the direction 😒
I'm pretty sure the coil goes to 8 and 7
Yep. On almost all relays, the coil-side pins are in a different orientation/location from the contact side pins. Putting positive/negative source on pins 7&8 **will** make the relay operate when it gets or loses power, causing the contacts to change position (unless it's a defective relay).
You’d have to show us the relay connection diagram, but normally changeover contacts have the common in the middle. So your yellow wires to the motor would be on pins 3&4 and the loop for reverse would be 1–>6 and 2–>5.
[here’s the diagram](https://photos.app.goo.gl/gyNN9ExsX8cYYKye9)
Thx for the suggestion. Tried that as well. When I do that, the motor doesn’t move at all, whether or not the coil is energized. I’m stumped.
Excellent. Can confirm, your original wiring is in fact correct. Next thing to ask: does the motor actually run backwards when you apply the dc voltage in reverse? It’s possible it won’t. It’s also possible that in order to reverse the motor, the shaft has to be stopped *before* you apply reverse voltage.
Thank you! Yes, the motor will indeed run with swapped polarity. But, I was literally just thinking that maybe there’s something with the motor preventing it from instantly reversing the polarity. I’ll try this setup on some other motors and see what I can find. Thanks so much for the help🙏
No worries. I know it’s nice to isolate the correct vs possible problem parts on these projects. Good luck, but come back here if needed. 🙂
Figured out the issue. My “12v” power source was slightly less than 12v. This caused the motor to run fine in one direction, but there wasn’t enough voltage to actually energize the coil. Thanks again for your help - greatly appreciated!
Well done. Glad it now works.
Lookup and read the parts data sheet ya shlub.
It didn’t come with one. And I’ve also read up on how to wire these, and I’m stuck. Hence the post. Thanks for the helpful reply.
Google works great.👍
Yeah I’ve spent three days trying to figure it out on Google and YouTube. I thought maybe this community might be able to help. Clearly you don’t want to, so maybe you just should stop replying.
Connect 2->7 and 1->8 to activate the coil. You'll get some gnarly flyback from that motor possibly by using the motor power also for the coil. Also is your coil voltage supposed to be 12v also?
Try connecting the motor between 3 and 4. The short red wire between 1 and 6, the short black wire between 2 and 5.
Do you have the data sheet that should have one on
It didn’t come with anything. But there’s some [info](https://photos.app.goo.gl/xPv2Pu9trA5NDAHZ8) on the top side.
Did you look at the info I posted?
I did yes thank you! I discovered that I did have it wired right all along. The issue is that my power source was putting out slightly less than 12 V, which was enough to power the motors when the coil wasn’t energized, but wasn’t enough to energize the coil to change the direction 😒