another radio on - key off 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=13744
Printed Date: June 09, 2024 at 11:54 PM

Topic: another radio on - key off question

Posted By: cabrone
Subject: another radio on - key off question
Date Posted: May 20, 2003 at 3:33 AM

The text that accompanies the "Radio On Until Door Opened" diagram states "If you wish to keep the radio (or any other device that is powered by an accessory circuit) on until a door is opened....."
OK, so here is what I am trying to do. I would like to configure this setup so that when I turn off the key and before I open the door, I can manipulate my windows and sunroof [ie open them or close them]
I have this setup currently where the radio stays on but am having trouble getting it to manipulate the circuit(s) that control the windows and sunroof.
Any suggestions?

Replies:

Posted By: auex
Date Posted: May 20, 2003 at 7:17 PM

Do the same relay as the radio, except feed power into the acc. wire at the ign harness, or what ever wire works for the windows.

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Posted By: the12volt
Date Posted: May 20, 2003 at 7:42 PM

Bad idea if the windows' main power lead is tied into the igntion lead and not the accessory lead, which it most likely is. Splicing 12V+ into this lead will cause the vehicle to stay running until you open a door. You should wire an additional relay into the power lead of each individual item you wish to supply power to in order to isolate it from other items powered by the ignition lead. For your power windows, cut and connect the igniton side of the windows' main power lead to terminal 87a, connect the other side of the lead to terminal 30, connect 12V+ (fused) to terminal 87, connect the output of your existing relay set up to terminal 86, and ground to terminal 85 and you'll be set to go.

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Posted By: cabrone
Date Posted: May 22, 2003 at 6:57 AM

Hey 12volt, [or anyone else who can help] could you possibly tell me how to figure out which wire is "the windows' main power lead..."? I can find the LF & RF Windows Up and Windows Down wires but I am clueless as to what specific wire is their main power source.
The car is a 2000 Honda Civic EX.

Thank you for your replies.