dual triggers for relay diodes required?
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=106887
Printed Date: July 07, 2025 at 11:08 AM
Topic: dual triggers for relay diodes required?
Posted By: OBWAN
Subject: dual triggers for relay diodes required?
Date Posted: August 19, 2008 at 12:44 AM
Sorry for if this is a newbie question, but after a few searches, I haven't been able to find a similar thread.
I have a 2000 Ford Excursion. I plan to install a set of auxiliary back-up lights. The lights will be powered by the back-up light circuit off of the towing harness. Simple enough, but what I also want to do is install a switch at the dash that will allow me to turn the lights on without having to put the car into reverse.
I have found the relay in the engine compartment that controls the back-up light circuit in the tow harness. I plan to connect a powered switch to the relay as a second trigger source.
My question is: should I install a diode on both the new trigger that I am putting in as well as one on the original factory trigger?
Thanks in advance.
Brian
Replies:
Posted By: KPierson
Date Posted: August 19, 2008 at 6:00 AM
If you don't install a diode then most likely the OEM back up lights will come on when you flip the switch. If that's not a big deal then you should be able to leave the diode out. If you only want the added lights to come on then a diode would acomplish that.
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Kevin Pierson
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