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How To Wire A Relay

 
 
 
 
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Old 06-18-2009, 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; 07-19-2009 at 01:25 PM.
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Old 06-18-2009, 03:57 PM
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good one bobby nice find
 
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Old 06-18-2009, 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.
 
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Old 06-18-2009, 04:25 PM
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What about three pin relays?
 
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Old 06-18-2009, 05:13 PM
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Originally Posted by Begle1 View Post
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.
 
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Old 06-18-2009, 05:13 PM
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how bout 5 pin relays...
 
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Old 06-18-2009, 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; 06-18-2009 at 05:39 PM. Reason: Automerged Doublepost
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Old 06-18-2009, 05:52 PM
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Originally Posted by Begle1 View Post
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.
 
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Old 06-18-2009, 05:52 PM
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Originally Posted by 2500HeavyDuty View Post
how bout 5 pin relays...
YOU!!! OUT OF MY THREAD!!!


















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

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