door lock relays
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=1224
Printed Date: May 12, 2025 at 5:11 AM
Topic: door lock relays
Posted By: dyer
Subject: door lock relays
Date Posted: June 10, 2002 at 3:34 PM
the alarm I'm installing uses negative pulse. My car uses posititve pulse. So I need a relay. Right? How many do i need? Do i need one for my trunk also (it is positive)?
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Dyer
Replies:
Posted By: Velocity Motors
Date Posted: June 10, 2002 at 4:45 PM
You will need to wire up two relays like this : - 86 & 87 : Constant 12 volts
- 85 : ( - ) Alarm door lock or unlock wire ( or your trunk trigger wire form alarm )
- 30 : ( + ) output to door lock/ unlock ( or your trunk release wire )
------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: Chris Luongo
Date Posted: June 10, 2002 at 5:07 PM
Yeah, what Jeff said. One relay for each function. So you'll need three relays. The ones from DEI clip together, or you can lay three separate ones side-by-side and tape them together---it's easier and neater to intall them as one relay bank. I'm surpised that your alarm doesn't have outputs that do both negative and positive; it's a common feature these days.
Posted By: dyer
Date Posted: June 10, 2002 at 7:44 PM
so for each of the 3 relays i will have constant 12 going to 86 and 87? Then the lock, unlock, and trunk wire will come into the 85 from the alarm? Then the wire will come out of the 30 to the lock, unlock, and trunk?
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Dyer
Posted By: Velocity Motors
Date Posted: June 10, 2002 at 8:38 PM
You bet !! All right on all three of the above. You need (3) relays to do each individual wire. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: dyer
Date Posted: June 16, 2002 at 4:22 PM
i have this done, but still nothing works.
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Dyer
Posted By: Velocity Motors
Date Posted: June 16, 2002 at 4:45 PM
Are you using a SPDT relay rated at 30/40 amps ? Where are you grabbing the constant power from for the relays and also is the target wires the proper wires that you verified with a DMM ? ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: dyer
Date Posted: June 16, 2002 at 6:41 PM
A SPDT relay at 30/40 amps? not sure. I bought the relays at radio shack for 6 bucks each. it has four outputs (85,86,87,30) Where am i grabbing power? coming from the '87' of both relays, i have them tied directly to a 12 volt source near the battery. I know it is good and hot because it is the same source i use for my audio system (amp power source). Also i assume the red wire coming from the alarm is a 12v source. In my instructions that came with my alarm, it says to tie this red wire into '86' on both of the relays. Are the wires the proper wires i verified with a DMM? I don't know what a DMM is. However, i do believe they are the right wires. It seems they are tied into some kind of factory relay. In another post awile back, i told you it had 6 wires: light blue, grey, thick black, ORANGE / black, tan, and thin black. You then told me: "This black box is your door lock relay module for the GMC. The wires you are looking for are in this module. I posted the wire colors of this truck in a previous post and because you have factory keyless entry, your GMC requires a (+) pulse activation and this will locl/unlock the doors. The wires are all there and if you test the wires for circuit verification, you will find which wires you will need.".........So i did test them. This is what i found. The light blue and the grey show +12v when the lock button is pushed. The thick black shows nothing (assuming ground). The ORANGE / black is constant +12v. And the tan and the thin black wires show +12v when unlock is pushed. These are the right wires right? Does it matter which lock or unlock wire i tie into? I am tied into the lt blue and the tan right now, and nothing works. What should i try?
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Dyer
Posted By: Velocity Motors
Date Posted: June 16, 2002 at 9:34 PM
There's your problem, you need the relays that have 5 contact points like this: l l _ l l ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: dyer
Date Posted: June 17, 2002 at 5:47 AM
ok i'll try that. would my other relays by chance drain my battery? ------------- Dyer
Posted By: Velocity Motors
Date Posted: June 17, 2002 at 6:16 AM
Chances are that is what they are doing. The pole is always connected to the constant power wire which slowly draws power from the battery.
-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: dyer
Date Posted: June 17, 2002 at 1:11 PM
ok......I went to a car security specialty shop and bought relays(the same they use). They are the 5 prong. I hooked then up. My lock works great, but my unlock doesn't work at all.
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Dyer
Posted By: zoum_7
Date Posted: June 17, 2002 at 1:47 PM
I need to install a central locking system on my VW Golf 1981, what do i have to do, and what do i need, i only got the actuators
Posted By: dyer
Date Posted: June 17, 2002 at 3:19 PM
do you want it to be a keyless entry system? If so then buy a keyless entry module or alarm and follow the instructions. For more replies to your post and more professional help (i'm not one) create your own post. The people here are awesome and they would be more than happy to help ya. By he way, what are the prices like in lebanon? just curious.
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Dyer
Posted By: Velocity Motors
Date Posted: June 17, 2002 at 4:55 PM
You must not have grabbed the right unlock wire then. Which one have you got going to the alarm ? ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: dyer
Date Posted: June 17, 2002 at 9:11 PM
originally i had the tan one. This didn't work either, so........ i tried the thin black one. This also doesn't work. It blows my mind though because when they are disconnected the unlocking doesn't work at all, not by remote or by the door switches. So these have to be the right wires. Should i try tieing into both of them maybe?
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Dyer
Posted By: Velocity Motors
Date Posted: June 17, 2002 at 9:27 PM
Is this the 1994 GMC / Chevy S 15 ? ( Sorry, I answer alot of these questions and I can't keep track of all of them ) ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: dyer
Date Posted: June 18, 2002 at 11:57 AM
don't be sorry i appreciate all the help. Yes this is for the 1994 GMC s-15 jimmy SLT. It is automatic, 4dr, and 2wd.
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Dyer
Posted By: dyer
Date Posted: June 18, 2002 at 3:09 PM
let me explain how stupid i am. The relays are the prewired type that plugs and unplugs into itself. In the hour i've spent probing wires i could not figure out what was wrong. Then about 5 min ago i was working again and i felt something jab my side. It was the other part of the relay lying on the floor. I had it all wired and ready, but I FORGOT TO PLUG IT IN!!!!!!! i am very sorry for wasting your time on me. But thank you!
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Dyer
Posted By: Velocity Motors
Date Posted: June 18, 2002 at 4:10 PM
Ha , ha !!  That's a good one !! Don't feel foolish..... I've had my share of dumb ass moves too. Hope everything worked out and if you need anything else, just post your questions. ------------- Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
Posted By: dyer
Date Posted: June 18, 2002 at 5:42 PM
thanks a bunch
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Dyer
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