Latching Relay
Printed From: the12volt.comForum 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=145483
Printed Date: May 04, 2025 at 10:33 PM
Topic: Latching Relay
Posted By: bmillican
Subject: Latching Relay
Date Posted: June 24, 2019 at 11:14 AM
Hey gang, I am needing a latching relay to trigger a fan on an auxiliary trans cooler, I believe that the "Momentary to Constant output" located on this page https://www.the12volt.com/relays/special-relay-applications.asp would be the best option.
I guess I have two questions, 1) Is the diode a standard 1N type? 2) Will that diode keep all current from back feeding into the ground (trigger) circuit?
I intend to use an existing "Tow Mode" button on the vehicle which is a momentary ground trigger sent to the ECM to change transmission shift points. My fear is that when the latching relay is energized/de-energized that current might backflow into the ECM causing issues.
I have attached a basic diagram of how it will be wired.
I guess I have two questions, 1) Is the diode a standard 1N type? 2) Will that diode keep all current from back feeding into the ground (trigger) circuit?
I intend to use an existing "Tow Mode" button on the vehicle which is a momentary ground trigger sent to the ECM to change transmission shift points. My fear is that when the latching relay is energized/de-energized that current might backflow into the ECM causing issues.
I have attached a basic diagram of how it will be wired.
Replies:
Posted By: eguru
Date Posted: June 25, 2019 at 2:34 AM