ceiling dvd dome light relay now buzzing
Printed From: the12volt.com
Forum Name: Mobile Video, GPS, and Navigation
Forum Discription: Mobile Video Head Units, DVD Players, LCD and TFT Monitors, Navigation, GPS, PS2, PS3, XBox, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=138292
Printed Date: April 28, 2024 at 6:29 AM
Topic: ceiling dvd dome light relay now buzzing
Posted By: subarudude
Subject: ceiling dvd dome light relay now buzzing
Date Posted: January 18, 2015 at 1:59 PM
Hello All. very new to auto electrical work. I have a 2012 Subaru Outback. Installed Ceiling mount DVD. Original dome light is negative trigger and new DVD needs positive trigger. I installed SPDT Relay. Pin 87 and 86 tied together constant power. Pin 85 connects to car negative trigger. Pin 30 is now positive and connects to DVD dome light. GREAT now everything works when I open and close a door. Now the problem. When I close the door the doom light goes to about 8V and stays there around 10 seconds and dims out. The relay makes an awful buzzing. I have seen posts to add diodes and capacitors but I am a little lost even with a picture I saw Any ideas with instructions? Thank You
Replies:
Posted By: subarudude
Date Posted: January 18, 2015 at 2:14 PM
I found this very useful thread below. Not exactly sure where placement of diode and capacitor is since I am converting negative to positive.
https://www.the12volt.com/installbay/forum_posts.asp?tid=114184&tpn=3#555333
Posted By: i am an idiot
Date Posted: January 18, 2015 at 4:39 PM
Wire the diode and the capacitor just as it is in that picture. You are going to be using the other terminals to convert it to positive. Positive voltage to 30 and the positive wire going to your new light to 87.
Posted By: subarudude
Date Posted: January 18, 2015 at 7:42 PM
30 is still the positive connection to the dome light on the DVD player correct? I have 87 and 86 tied together. Do I leave that all in place and add the capacitor between 86 and 85? 85 gets a diode and that connects to the existing negative trigger coming from the original dome light connection. Is this all correct? Thank you for your help.
Posted By: i am an idiot
Date Posted: January 18, 2015 at 7:48 PM
Yes, all appears to be correct. Just make sure you polarize the capacitor correctly.
Posted By: subarudude
Date Posted: March 01, 2015 at 3:27 PM
I order the parts and followed the directions that were in these forums. It worked perfect. The buzzing is gone. Parts I used SPDT Relay Absolute RLS-125, Capacitor 1,000 uF, Diode IN4001 - micromini (Radio Shack) 
Posted By: subarudude
Date Posted: March 01, 2015 at 3:38 PM
I noticed in that pic the color of the wires did not show well where part of the unused red wire looks black as it loops up. And the blue wire looks half blue and half black. Focus on my diagram. Thanks a ton for the help..
Posted By: i am an idiot
Date Posted: March 01, 2015 at 4:39 PM
Posted By: subarudude
Date Posted: March 02, 2015 at 7:20 AM
Would it be OK to shrink wrap the Diode and Capacitor? I need to jam this up in the ceiling and there is a lot of metal up there.
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