Car alarm install - Door locks

[Austin]

so im in the final stages of wiring my alarm in but have run into a few problems. I need a relay for my door locks but i have no clue what one to get or how to wire it. I know there are some experts on relays here.
Please dont link me to the bcae website because i have read that website several times.

so here is the issue i have two wires for my locks, of course. and my pink/white wire is (+) when the doors unlock and the pink/green wire is (-). when they lock it is vise versa (pink/white is (-) and pink/green is (+).

I need some help to wire a relay to be triggered by a single wire when the wire is given a (+) pulse or a (-) pulse to give the corresponding voltage to the correct wire.

i think i need a dpst or dpdt relay...but it still doesnt make much sense to me haha.

[Soloact]

yr. and make of car would be ...helpful...
And make/model# of alarm would also be helpful
Here,try this...http://www.the12volt.com/doorlocks/doorlocks.asp

[Austin]

Originally Posted by Soloact

yr. and make of car would be ...helpful...
And make/model# of alarm would also be helpful
Here,try this...Automotive Power Door Lock Types, Determining Switch Types

The car is a 1994 mercury sable.
The alarm is a 7900 viper.

I might just bring it to my local car shop to have them wire up the door locks and what not.

[Austin]

What alarm have you guys have good luck with?

I think I'm out $170 on this alarm because its shit according to reviews I've been reading. I'm looking into the viper 5901 alarm...

[BoostedNihilist]

sounds like you have a reversing polarity door lock system to me. (confirmed)



Do this

[Austin]

Thank you^^^ thats a great help!

[BoostedNihilist]

if you're looking for the switch side or the motor side, when you have the wires cut, use your multimeter and look for the side with the voltage when the switch is pressed... this would be the switched side.

If, after everything is hooked up you blow a fuse, you have hooked one or both sides up backwards..

[cgarnes]

You could also buy a D.E.I. 451M Door Lock Relay Module. They are not that expensive and pretty easy to understand. We use them pretty often at our shop and have never had any problems with them. One module would work both doors.

[Austin]

Originally Posted by cgarnes

You could also buy a D.E.I. 451M Door Lock Relay Module. They are not that expensive and pretty easy to understand. We use them pretty often at our shop and have never had any problems with them. One module would work both doors.

Well its a 4 door sedan...would it still work? id rather use one of those than some standard relays.

Looks like sonic electronix has them for 8.99 plus shipping. I will go ahead and do that.

[keithace]

you can do it man...its a great learning experience...relays are fine and have been used for years...

[cgarnes]

Yeah the 451M will work fine. You'll just use two (2) of them; one for each pair of doors. They work great.

[Austin]

Originally Posted by cgarnes

Yeah the 451M will work fine. You'll just use two (2) of them; one for each pair of doors. They work great.

So i really need two of them? so that means i have another set of door lock wires huh? Ugh i might just bring this to my local shop and have them wire this up. I found a lot of 5 of those relays for cheaper than 2 would be so i will get those then have my shop wire it up for me. Unless someone on here can really help me out haha.

[BoostedNihilist]

austin, just use that diagram I gave you, you only need two SPDT (single pole double throw) relays, some connectors and some wire.

[Austin]

Originally Posted by BoostedNihilist

austin, just use that diagram I gave you, you only need two SPDT (single pole double throw) relays, some connectors and some wire.

Ok. So do i need to find another set of wires? or will it work with the two wires i have found already? Im probably going to get the 451 relays that cgarnes mentioned. If that doesnt work then i will do the two relays. I guess i will try it with the two wires i have now and then see if it locks/unlocks both doors.

Im waiting for a new remote and brain to come back to me since the one i originally had dont communicate with each other. I was really pissed about that one. But i am having it replaced.

[BoostedNihilist]

you use the two wires that you have already found.

Take the two wires, and cut them, you are now left with four ends. Use the relay diagram I provided and follow the diagram, and it will work.

[Austin]

Originally Posted by BoostedNihilist

you use the two wires that you have already found.

Take the two wires, and cut them, you are now left with four ends. Use the relay diagram I provided and follow the diagram, and it will work.

Ok thanks. I was mainly confused about another set of wires i needed. I will give this a shot this weekend. BTW, will i still be able to use my switch for my locks? Im not familiar with the internals of the spdt relay.

[BoostedNihilist]

yes,you will

[Austin]

Originally Posted by BoostedNihilist

sounds like you have a reversing polarity door lock system to me. (confirmed)



Do this

So I've been looking at this diagram a lot and i have one question pertaining to the unlock and lock wire. I'm assuming that those wires are determined by whether they contain the +12volts when it lock and unlocks right? so that means that there is no need for a grounding mechanism? sorry I'm just trying to get this right in my brain.

I got two of these from ebay because at my local shucks they are like $6 a piece and these come with cool wiring harnesses.
12V/12 VOLT 30/40A SPDT RELAY w/ SOCKET & WIRE HARNESS:eBay Motors (item 220382121985 end time Nov-16-09 15:01:18 PST)


This is what i have been going off of:
http://www.the12volt.com/installbay/...tail/1498.html

It says my pink/yellow is my lock wire and my pink/light green is my unlock. So would i follow this?

[Austin]

Also, For my radar/proximity sensor where should i mount it? Is under the dash ok?

Do i need it flat?

Would it be better to mount it near the center of the car such as on the hump between the two seats?

[BoostedNihilist]

are you talking about the lock.unlock wires coming off the brain or the ones in the car?

i usually put my radar sensors somewhere in the middle like the hump good idea.

[Austin]

Originally Posted by BoostedNihilist

are you talking about the lock.unlock wires coming off the brain or the ones in the car?

i usually put my radar sensors somewhere in the middle like the hump good idea.

Here is the installation guide. Go to page 19 and tell me how you think i should wire it up to that relay diagram you gave me.

http://www.directeddealers.com/manua..._12-06post.pdf

also for the radar sensor, would it be ok to mount it under the carpet? or should i just keep it on top and slit the carpet for the wire?

[Austin]

bump.

[BoostedNihilist]

Austin.. I am out of town right now, when I get back home tomorrow im gonna whip you up a youtube to check out.,. wont be until like 8 pst though.,. we'll get this shit done!

[Austin]

Originally Posted by BoostedNihilist

Austin.. I am out of town right now, when I get back home tomorrow im gonna whip you up a youtube to check out.,. wont be until like 8 pst though.,. we'll get this shit done!

Haha alright thanks man. You are a great help to me right now.

[60ampfuse]

Austin, maybe I missed it somewhere but did the car come with a factory keyless entry or does it have the keypad on the outside?