How To Wire A Relay
#1
06-18-2009, 03:28 PM
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.
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.
Relay Wiring
Last edited by RSWORDS; 07-19-2009 at 01:25 PM.
The following users liked this post:
kslb7 (06-19-2009)
#3
06-18-2009, 04:16 PM
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.
#5
06-18-2009, 05:13 PM
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.
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.
#7
06-18-2009, 05:39 PM
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...
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
#8
06-18-2009, 05:52 PM
