My b/f is trying to install an alarm in my 90' 240sx SE. I may need to try an auto alarm tech site, but thought I would try here first.
My alarm manufacturer is asking whether I have a "positive" or "negative" door switch trigger input (the wire to the door pin switch which supplies the on/off power to my dome light when door is open). How do I find out? Is this info in the car manual? We can't find it in the Chilton.
Any help would be greatly appreciated. Thanks!
-cristyna77
Installing car alarm
-
topless@vabeach
- Posts: 131
- Joined: Thu Sep 19, 2002 11:56 am
- Car: Electronics, anything that has trons in it.
My 1993 240 SX is a negitive trigger. I found the information on this website. We use this site as a reference before wiring in car alarms.
http://www.clifford.com/guides/wiring/a ... wiring.pdf
http://www.clifford.com/guides/wiring/a ... wiring.pdf
-
topless@vabeach
- Posts: 131
- Joined: Thu Sep 19, 2002 11:56 am
- Car: Electronics, anything that has trons in it.
when you start your car, do you have to press the clutch down? if not then you don't have to worry it's already bypassed, if you do then you have to. There's also a neutral safety wire (thin black/white wire) u can either do things the hardwire and find the neutral wire on your car, or you can just ground that wire. When I do remote starts I just ground that wire.
-
Silvia2b
- Posts: 783
- Joined: Mon Oct 28, 2002 9:33 pm
- Car: 95 240sx se / 07 G35s cpe / 2009 G37s sedan (rear-ended R.I.P.) / 19 Q50 rs400AWD
- Location: Portland,OR.
Car alarm
Did you get your alarm intalled o.k.? let me know if you're still working on it I am pretty familiar with that alarm. and I have all the Technical resources from the Clifford/DEI trainnings.
Sorry for the late reply, had a couple of hectic days. I forgot the brand of the alarm. got it for my birthday, but i think it might be something cheaper than the clifford. I have to press the clutch to start the car. Where would the neutral wire be and what do i do with it if i find it also i think the grounding sounds easier so how do i do that.
Look behind your clutch pedal, find the wire that changes polarity when you press down on it, if it shows a ground whenever you press down on it, you can cut that wire and ground it.
In the alarm brain the nuetral safety wire is black/white you can tap it on to your black wire of your alarm (ground).
In the alarm brain the nuetral safety wire is black/white you can tap it on to your black wire of your alarm (ground).
SO i ground the neutral safety wire and ground the clutch wire. so this means i can now start my car without stepping on the clutch. Is there any way i can set it up so that i still use the clutch but when i use the remote somehow the clutch wire gets passed on a ground signal? i hope that makes sense.
P.S. I'm assuming you guys know that the remote start i'm talking about is actually made for manual transmissions
P.S. I'm assuming you guys know that the remote start i'm talking about is actually made for manual transmissions
No 1991.
SO i ground the neutral safety wire and ground the clutch wire.
Yes and no, you ground the neutral safety wire that's coming FROM the alarm brain yes, but the wire from your clutch, you have to test it with a test light/Digital Multi Meter, determine what polarity it is by tapping it to the wire that comes from your clutch when you press down on it, the clutch will change polarity, this lets the ECU in the computer knows that you've physically pressed down on the clutch. If the polarity shows positive you have to imitate that by using relays. But if it shows ground you can simply ground that wire.
Is there any way i can set it up so that i still use the clutch but when i use the remote somehow the clutch wire gets passed on a ground signal?
Yes, by cutting the wire coming from YOUR car's clutch in half and putting it through a relay. It's really hard to explain how relays works, the best thing is to search online and knows it's poles, once you do wire it like this.
Wire from the clutch cut in half.One side of the wire put to 87aAnother side put to 30 (normally closed)constant on 86blue/black wire from your ALARM's brain on 85ground or constant on 87 depending on what polarity it is when you press DOWN on your clutch.( this will imitate the polarity like as if you pressed down on the clutch to start the car physically, while still maintains your factory settings.)
Hope this helps and not confusing you, when you read about relays it should be simple.
SO i ground the neutral safety wire and ground the clutch wire.
Yes and no, you ground the neutral safety wire that's coming FROM the alarm brain yes, but the wire from your clutch, you have to test it with a test light/Digital Multi Meter, determine what polarity it is by tapping it to the wire that comes from your clutch when you press down on it, the clutch will change polarity, this lets the ECU in the computer knows that you've physically pressed down on the clutch. If the polarity shows positive you have to imitate that by using relays. But if it shows ground you can simply ground that wire.
Is there any way i can set it up so that i still use the clutch but when i use the remote somehow the clutch wire gets passed on a ground signal?
Yes, by cutting the wire coming from YOUR car's clutch in half and putting it through a relay. It's really hard to explain how relays works, the best thing is to search online and knows it's poles, once you do wire it like this.
Wire from the clutch cut in half.One side of the wire put to 87aAnother side put to 30 (normally closed)constant on 86blue/black wire from your ALARM's brain on 85ground or constant on 87 depending on what polarity it is when you press DOWN on your clutch.( this will imitate the polarity like as if you pressed down on the clutch to start the car physically, while still maintains your factory settings.)
Hope this helps and not confusing you, when you read about relays it should be simple.
Ok yesterday I just installed an alarm/remote (550 esp) start by viper in my 92 HB.
several problems I've came across was:
the door locks for keyless entry, when I tried tapping into the doorlock wire (one wire, floating ground) doesn't seem to correspond to what I wanted to do. After about 2 hours of trouleshooting, I found out that I shorted out the factory actuator. So I called DEI up, and they told me I needed to ADD an extra actuator to to the physical work of keyless entry. My 92 HB has central locking. I had to take out the drivers door panel and find a location for the actuator, and I found a nice spot to the left in the big hole where u can peep through to see the door lock cylinder, while I was at it, I drowned it with WD-40, (works like a charm) after I screwed the actuator down I notice I lost my rod that connects to the actuator arm, so I had to sit them smoked couple cigs to think of a way to homemake my own, so I took a coathanger and bent it around the arm, wired up 2 relays and the keyless entry was done.
The other problem I came across was to bypass the clutch, this is what you wanted to know T_love. I looked at the pedal of my clutch and saw 2 wires, do not be fooled these are NOT the wires, if you look further back, you will see a push button that corresponds to the clutch pedal, when you press ALL the way down it will touch this push button therefore letting the ecu know to let you start the car. What I've done to keep the factory function while still bypassing for the remote is this: I went and made a relay, tapped the 85 pole onto the think pink wire coming from the remote start harness. That will be the trigger, the 86 pole will be constant, pole 30 will be tapped onto red/white wire coming from your clutch. That wire is hidden under a plastic tube, just cut it open and you'll see it. That wire needs a negative trigger, so pole 87 I put ground to. after that everything is self explainatory.
So about 2 hrs wasted on the actuator it took me around 4 hours to finish everything. I also added a push button for remote start like the s2000, that was simple, take the blue/white wire and connect it to one side of the push button, the other wire from the pushbutton to ground. Hope this helps.
several problems I've came across was:
the door locks for keyless entry, when I tried tapping into the doorlock wire (one wire, floating ground) doesn't seem to correspond to what I wanted to do. After about 2 hours of trouleshooting, I found out that I shorted out the factory actuator. So I called DEI up, and they told me I needed to ADD an extra actuator to to the physical work of keyless entry. My 92 HB has central locking. I had to take out the drivers door panel and find a location for the actuator, and I found a nice spot to the left in the big hole where u can peep through to see the door lock cylinder, while I was at it, I drowned it with WD-40, (works like a charm) after I screwed the actuator down I notice I lost my rod that connects to the actuator arm, so I had to sit them smoked couple cigs to think of a way to homemake my own, so I took a coathanger and bent it around the arm, wired up 2 relays and the keyless entry was done.
The other problem I came across was to bypass the clutch, this is what you wanted to know T_love. I looked at the pedal of my clutch and saw 2 wires, do not be fooled these are NOT the wires, if you look further back, you will see a push button that corresponds to the clutch pedal, when you press ALL the way down it will touch this push button therefore letting the ecu know to let you start the car. What I've done to keep the factory function while still bypassing for the remote is this: I went and made a relay, tapped the 85 pole onto the think pink wire coming from the remote start harness. That will be the trigger, the 86 pole will be constant, pole 30 will be tapped onto red/white wire coming from your clutch. That wire is hidden under a plastic tube, just cut it open and you'll see it. That wire needs a negative trigger, so pole 87 I put ground to. after that everything is self explainatory.
So about 2 hrs wasted on the actuator it took me around 4 hours to finish everything. I also added a push button for remote start like the s2000, that was simple, take the blue/white wire and connect it to one side of the push button, the other wire from the pushbutton to ground. Hope this helps.
the relay should have 5 poles, I really wouldn't prefer radio shack, they will RIP YOU the **** OFF! I suggest your local audio/security store, that deals with automotive, when we have people going in to look for relays we will sometimes give it for free if we're in a good mood, or if our boss is around we will charge about 25 cents. But if u go to radio shack it's prolly about couple dollas. the relay you want to be lookin for is 30a yes, it should look like a small black box:
_ | - | |
It should look something like this on the back. (I tried my best)
_ | - | |
It should look something like this on the back. (I tried my best)
MECP Certified, also nothing gives me greater pleasure than to do things for myself, I bought my 550esp for $147, as outside we would charge anyone a easily $400 for the 550esp installed, so you tell what's better spending that extra 250 or savin that 250 for lets say something else for your car. But hey if you got the money and don't wanna get your hands dirty you can take that approach either, but I get the great sastisfaction of sayin, hey I did that, not oh yea I paid $400 to have it done.. no offense, but that's why most of us are on this board, to do things for ourselves correct me if im wrong.. no?
