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Old 01-21-2003, 09:34 PM   #1
sonicblue
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Default Help me finish my starter button installation

I only have one question that needs an answer: what wire can I tap into under the steering column that is hot ONLY when the key is turned to 'ON'??

I had one of those S2000 buttons installed by a shop and they butchered it (though it is half the button's fault for being way more complicated than it needed to be). I bought a simple little momentary button from Radio Shack but I may still try to use the S2000 button. Either way, I need to know the answer to my question - please help!!
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Old 01-22-2003, 01:52 AM   #2
axis
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What you want to do is to interupt the starter wire not an ignition wire. The starter wire will test 12v only when you crank the starter and will drop out when the key falls back to the run position. The starter wire should be a black/yellow wire but you always want to test it first. Hope that helps.

Dan
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Old 01-22-2003, 08:31 AM   #3
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You may want to take a look at this thread:

Starter Button

I haven't tried this yet so have no personal experience. Please report back as to whether or not this works for you though. Thanks and good luck.

Scott Buchanan
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Old 01-22-2003, 09:13 AM   #4
sonicblue
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Quote:
Originally posted by axis
What you want to do is to interupt the starter wire not an ignition wire.
Dan
The ignition wire is 'the goods' - that's where the power needs to ultimately get to in order to start the car. Why wouldn't you just go straight to that?

Quote:
Originally posted by sTech, LLC

You may want to take a look at this thread:

Starter Button
Yes, I looked at that thread but he only mentions the general idea of tapping a 12V wire that is hot with 'ON' position. I can't find such a wire. I don't have a voltmeter so I was hoping someone just knew. If no one does, I'll pick up a meter on the way home and go a-huntin'.....

Last edited by sonicblue; 01-22-2003 at 10:21 AM.
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Old 01-22-2003, 12:41 PM   #5
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Grab a wiring diagram. On page 11 you find the ignition switch. Wires that have +12 in the "ON" position are connected to 2 & 4 (the yellow and green wires). You would want the green one, as it has 12v in the "ON" position and the yellow has it on "ACC"...you dont want to start your car when the key is in "ACC"
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Old 01-22-2003, 01:10 PM   #6
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Quote:
Originally posted by cdvma
Grab a wiring diagram. On page 11 you find the ignition switch. Wires that have +12 in the "ON" position are connected to 2 & 4 (the yellow and green wires). You would want the green one, as it has 12v in the "ON" position and the yellow has it on "ACC"...you dont want to start your car when the key is in "ACC"
Beautiful! Thanks for the info. I'm WAY a n00b when it comes to electrical, so I wouldn't have been able to find this on my own. I'll give it a go tonight and post the results.
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Old 01-23-2003, 09:04 AM   #7
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Do I have a different car or something?? The wiring diagram says there should be a little blue harness by the ignition switch. I have three harnesses under my column, all are white. None had four wires where a solid yellow and solid green are in there. Nonetheless, I figured it out. That's the good news. Bad news is I had totally taken out the button and undid the wiring my shop did. Turns out, all I had to do was swap one wire to a different hot source and I would have been done. Oh, well, success at last......here's the bullet:

Take off bottom of steering column and look at the left side. There's that little "hub" of soldered wires on the back side of the ignition. The one at the 5 o'clock position (black/yellow) is the ignition wire. The one at the 7 o'clock position (black) is the hot source you want (only hot when key at 'ON' and dead otherwise. Tap a wire into both, put a momentary button between and you're done. Car will start with EITHER key or button. If you want extra security, don't tap the black/yellow - cut it. Tape off the end that's attached to the "hub" and the car will ONLY start with the button.

Sorry, no pics, I was up too late trying to bang this out and unjamming my CDs. Maybe tonight I'll try to take pics and send them over to scoobymods.
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Old 01-23-2003, 10:30 PM   #8
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holly crap! Why does nobody ever listen to me. Did I not say black/yellow for the starter wire? Five years of doing this crap has taught me a few things.

Anyway, it's great that you did finally figure it out. Congrats!

Dan
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Old 01-24-2003, 08:24 AM   #9
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yes, you did say b/y, but something else you said confused me. You said that wire was only hot when you crank the starter. That made it sound like that was the wire you were saying to GET your hot from, but that isn't true. The b/y isn't your hot source - that's the wire that you want to connect your hot source TO. Maybe that's what you meant, so I'll still give ya' credit, but it was a little sketchy
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Old 01-24-2003, 12:21 PM   #10
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All of the S2000 starter button instructions I've seen outside of the NASIOC call for the use of a 30-40amp relay in conjunction with the button. Here are a few examples:

http://www.iluvmyrx7.com/3rdgen/how-to/s2000button.htm
http://www.miata.net/garage/pushstart/
http://www.angelfire.com/mac/brb/brbindex.html

At least one set of instructions went so far as to say it would be very dangerous NOT to use a relay and would, at the least, shorten the life of the button. Any thoughts on this? My thought is it's better to be safe than sorry. "sonicblue", where did you end up mounting your button?

Scott Buchanan
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Old 01-24-2003, 04:11 PM   #11
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So is my car going to blow up or what? I'm an electronics n00b - seemed simple enough to me: insert switch between two points. The switch I bought did come with a relay I think but I was a dumba$$ and removed it all. Now I can't remember what hooked to what on the relay and the instructions are long gone.

BTW here's my location:
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Old 01-24-2003, 04:16 PM   #12
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Quote:
Originally posted by sonicblue
So is my car going to blow up or what? I'm an electronics n00b - seemed simple enough to me: insert switch between two points. The switch I bought did come with a relay I think but I was a dumba$$ and removed it all. Now I can't remember what hooked to what on the relay and the instructions are long gone.
Not really sure what to tell you since I have no direct experiences from which to speak. I plan to undertake this project in the near future and believe I'll end up using part of the directions found in the links I posted. Where did you buy your button and how much did it end up costing?
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Old 01-24-2003, 05:50 PM   #13
sonicblue
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I bought it on eBay for, like $25 I think. There was a rough schematic - I didn't want to try. My shop tried but the way they had it made me crank the key AND push the button. Turns out I only had to change one wire but too late for that.....

If you want to get one, check this guy's auctions. I may pick up another one myself and do it right.....
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Old 01-24-2003, 10:48 PM   #14
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Quote:
Originally posted by sonicblue


BTW here's my location:
I wonder if that would be a nice little theft deterrant? So what if you hot wire the car? If you forget about the button, it wont turn on. (but then they'll come back with a flatbed and it'll all be over.)
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Old 01-24-2003, 10:56 PM   #15
Vostok 7
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Does that one light up?

I think having a starter button would be cool.

Vostok 7
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Old 01-25-2003, 01:52 PM   #16
sonicblue
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No, doesn't light up and, yes, it does function as a theft deterrent in that location, too
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