Thread: RELAY Wiring

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I am wiring relay to headlight circuit to take load off headlight swtich and reduce voltage drop. The relay I am using has 2 rows of lugs ( not #'ed) one above the other- no a lug on each side as I am familiar with. I isolated contacts (GRD.) and (activation lug) - 2 left ,one would be Batt in -the other would go to headlight circuit. These are NOT #'ed as most relay lugs are, does it matter which lug I use for either circuit? Thanks, 34

With four terminals you have a SPST relay, normally open, closed when energized. If you've identified the actuating coil contacts (85 & 86), then the other two are your load contacts (30 & 87) and they are a simple switch. You can hook your 12V battery power to either one, and run your output to the headlights from the other. Here's a link that someone posted previously (streetworks??) that explains the mysteries of relays:
http://www.watsons-streetworks.com/current_topic.html

This is to run a dual relay for headlites....joe

http://www.alanhorvath.com/54chevy/headlight_relays.php

Thanks, the problem is I have the diagram for the above relay . My terminal (lug/post set-up) looks like this _- -_

The post are not #ed as in your diagram, I am using these relays as I have good heavy duty sockets for them and They were from an extra harness I had used parts from before. Thanks for INFO!!!!!!!!!!!!!!!!

You can figure out the wiring with about three minutes of testing. Put 12 volts across either the long dash in your representation or the short dash pair. You will hear/feel the relay coil pull the contacts closed. If the long dash side doesnt work, try the other. You cannot hurt the relay with 12 volts, no matter how you connect it. One pair is the coil and one pair is the load.

Thanks for all response !