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How To Wire A Relay

 
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Old Jun 18, 2009 | 03:28 PM
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Default How To Wire A Relay

I always have a problem trying to remember how to wire up a relay, So after searching the web for the 398574097236 time I came across this. Its the best digram I have seen yet!

Relay Wiring Diagram

A relay is typically used to control a component that draws high amperage. The relay allows full power to the component without needing a switch that can carry the amps. The switch only controls the relay. The relay then provides a direct connection to the battery. It should be noted that either the power(86) or ground(85) in the relay control circuit can be switched. In the case of a horn, the horn button would be used to switch the ground lead(85) and power(86) would be provided directly from the fuse box.

This is a typical wiring diagram for a standard relay installed for headlights, horn, fuel pump, electric fan, etc. If the relay has a 5th terminal, it is not used.



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Relay Wiring
 

Last edited by RSWORDS; Jul 19, 2009 at 01:25 PM.
Old Jun 18, 2009 | 03:57 PM
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good one bobby nice find
 
Old Jun 18, 2009 | 04:16 PM
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That does help. But you should remember the 87a contact is energized when the coil is off(switch is off). Comes in handy depending on how your wiring things.
 
Old Jun 18, 2009 | 04:25 PM
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What about three pin relays?
 
Old Jun 18, 2009 | 05:13 PM
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Originally Posted by Begle1
What about three pin relays?
That one is on you Begle.

this was more or less so that I could find it next time I need to wire a relay.

I do it every time, sit there staring at the relay and eventually say f-it and go search on the net for how to wire it... Every time! You would think by now I would have it memorized.
 
Old Jun 18, 2009 | 05:13 PM
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how bout 5 pin relays...
 
Old Jun 18, 2009 | 05:39 PM
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I got lots of 6 pin relays.

I might even got some 8 pin relays around.


And lets not forget solid state relays.

---AutoMerged DoublePost---

If there's really demand, I could make some diagrams...
 

Last edited by Begle1; Jun 18, 2009 at 05:39 PM. Reason: Automerged Doublepost
Old Jun 18, 2009 | 05:52 PM
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Originally Posted by Begle1
I got lots of 6 pin relays.

I might even got some 8 pin relays around.


And lets not forget solid state relays.

---AutoMerged DoublePost---

If there's really demand, I could make some diagrams...
Make em up Begle! I'll stick them in teh 1st post. I'm not much on electricity so I dont play with all that fancy *** stuff. A regular relay is about as wild as I get before I call someone else.
 
Old Jun 18, 2009 | 05:52 PM
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Originally Posted by 2500HeavyDuty
how bout 5 pin relays...
YOU!!! OUT OF MY THREAD!!!


















 
Old Jun 18, 2009 | 06:52 PM
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so would that be a n/o relay or a n/a relay?
 



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