Does this relay diagram make sense?

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=143127
Printed Date: May 12, 2025 at 4:57 PM

Topic: Does this relay diagram make sense?

Posted By: bryanmartin
Subject: Does this relay diagram make sense?
Date Posted: July 07, 2017 at 12:19 AM

Hi. I'm wiring in a remote entry system, and the instructions show this diagram for wiring the relay. I'm concerned because this goes against what I know about how relays work (which isn't much). Everything I've seen has 30 going to battery positive, 85 to ground, 86 is the switch that connects the two, and 87 is the output with 87a being the power through the "off" position. Does this diagram make sense?

posted_image

Thanks,
Bryan

Replies:

Posted By: i am an idiot
Date Posted: July 07, 2017 at 1:28 PM

It is fine. If the alarm is armed it will put ground on the orange wire. Anytime the start wire is energized with the alarm armed, the relay will energize and break the connection between 87a and 30, thus not allowing the starter motor to turn.

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