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relay and toggle switch

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=93519
Printed Date: May 15, 2024 at 1:28 PM


Topic: relay and toggle switch

Posted By: mr348
Subject: relay and toggle switch
Date Posted: May 01, 2007 at 6:31 PM

I am sure this has been asked a hundred times but could someone please help me out. i am wiring a hot rod and have an aftermarket wiring harness. (EZ wiring) I am putting 2 relays in the system to control the fuel pump and the electric fan. I am going to run both items off of seperate toggle swithces. Here is my question, how do I wire the first relay to have the fan toggle switch always hot so I can run the fan even with the key off? that way I can use the toggle to cool the car with the key out of the ignition. Second, how do I wire the second relay to the toggle for the fuel pump so that the toggle will only work with the key on? All i need is what sequence ot run wires to what number on my relays I have numbers 85,86,30, 87, 87a. Thank you in advance for all of your help.

~Jeff Cornick




Replies:

Posted By: iblis
Date Posted: May 02, 2007 at 9:59 AM

Fan:
85 - 12V output from toggle switch
86 - Earth
30 - 12V constant power, direct from battery if necessary, but fused appropriately
87 - Fan (+)
87a - Nothing

Fuel pump:
85 - 12V output from toggle switch
86 - Earth
30 - 12V ignition lock controlled power, fused appropriately
87 - Pump (+)
87a - Nothing





Posted By: hotwaterwizard
Date Posted: May 05, 2007 at 12:59 AM
posted_image

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John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !





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