simple acc
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=93278
Printed Date: May 18, 2024 at 3:04 PM
Topic: simple acc
Posted By: 12v nut
Subject: simple acc
Date Posted: April 24, 2007 at 6:32 AM
Hi all. Sorry for posting this because its probaly so simple to all of you, I have searched but cant find an answer. All I need is the info on which pins to connect to on a relay to add a dvd player to my trunk. What I want to do is connect to the battery direct with a fused link and connect an existing wire from the car which is live when the acc position is turned by the key.This will then energise the relay to send the 12v fron the battery via the relay to the dvd player. Thanks
Replies:
Posted By: spookiestylez
Date Posted: April 24, 2007 at 11:05 AM
First we need to know what year,make,model of vehicle it is.
sS
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RTFM
Posted By: 12v nut
Date Posted: April 24, 2007 at 11:12 AM
Sorry....its a BMW e46 2002.
Posted By: 12v nut
Date Posted: April 24, 2007 at 11:41 AM
Just to clarify, I dont need any wire colours, I found them. Thanks
Posted By: ferretvw
Date Posted: April 24, 2007 at 12:21 PM
85- ground 86- ACC 87- out to DVD 30- constant power 87a- No connection good luck --->Richard ------------- 2008 Scion xB
Pioneer AVIC-D3
RF 3Sixty.2 sound processor
Stock speakers (for now ;))
Posted By: 12v nut
Date Posted: April 24, 2007 at 1:03 PM
ferretvw wrote:
85- ground = any ground in car? 86- ACC = positive? 87- out to DVD = positve feed? 30- constant power + fused from battery? 87a- No connection good luck --->Richard
Just checking? When I thought I had all the wire colors sorted two i'm not sure of..in trunk reverse + & - colors please for rear cam install. many thanks.
Posted By: ferretvw
Date Posted: April 24, 2007 at 5:09 PM
yes 85 to any good ground in the car, preferably make your own. and 86 will go to the wire that you want to use to activate the relay and needs to be positive, 87 will go to the power wire for the dvd and 30 is going to the battery or other 12v constant source and should be fused. As for the reverse lights you should only need either positive or negative generally not both to check just check the wires going to the reverse light bulb one will either go to ground when car is in reverse or it will go to 12v when the car is in reverse then use the appropriate one from the rear view camera.
--->Richard
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2008 Scion xB
Pioneer AVIC-D3
RF 3Sixty.2 sound processor
Stock speakers (for now ;))
Posted By: 12v nut
Date Posted: April 24, 2007 at 5:42 PM
Many thanks for the help 
Posted By: 12v nut
Date Posted: April 27, 2007 at 5:55 AM
Worked a treat...many thanks for your help..... 
Posted By: 12v nut
Date Posted: May 01, 2007 at 3:02 PM
Hi, i have noticed if pins 87 and 30 are swapped it still works?
Posted By: iblis
Date Posted: May 02, 2007 at 10:09 AM
When the relay coil is energised 30 and 87 have continuity, ie they are connected to eachother, so current can flow from one to the other. When it is not, 30 and 87a have continuity. Which direction it flows is irrelevant. It's the same as there just being a piece of wire between 30 and 87. Hopefully this [very poor quality!] diagram helps explain? 
Posted By: 12v nut
Date Posted: May 02, 2007 at 1:27 PM
It clears it up perfectly my friend. Thanks
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