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dumb coil question

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=31297
Printed Date: May 10, 2025 at 9:57 AM


Topic: dumb coil question

Posted By: equium
Subject: dumb coil question
Date Posted: April 29, 2004 at 5:16 PM

i am considering using relays to increase the power to my headlights on my '91 ford F250.  when i look at the diagrams, i see power going to one of the coil pins and ground to the other coil pin.  is it that easy?  i know if you took a wire off the pos terminal of a battery, and touched it to the frame, it would spark.  i believe because there is no load.  does the relay provide a load between the coil pins?  i just don't want to blow anything up.  i must say, i had no idea so much fun can be had with relays.  thanks.




Replies:

Posted By: xetmes
Date Posted: April 29, 2004 at 6:28 PM
Yea it is that easy, the coil resistance is around 80 - 100 ohms, so the max current is only a few hundred milliamps...



Posted By: equium
Date Posted: April 30, 2004 at 1:40 AM
thanks xetemes. i cant wait to get to work with relays.  i can think of several projects already.


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