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Old 01-26-2010, 06:23 PM   #1
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Start engine wires (Help)

Hey guys I need to know what wires start the car and where they are.

Let me explain: i purchased the push to start button from AM (yes i knew it was for (05-09) so obviously the tutorial isnt the same for the 99-04. I have a place to mount it, all i need to know is what wires i need to connect it to.

if you need a better sense of how the button connects here is the tutorial for the 05-09. wiring instructions are towards the end

Push Start Mustang Ignition Button (2005-2009) - Installation Instructions at AmericanMuscle.com
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Old 01-27-2010, 08:24 AM   #2
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Re: Start engine wires (Help)

Instructional On installing a Push Button Starter - 3.8 Mustang Message Board
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Old 01-27-2010, 08:42 AM   #3
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Re: Start engine wires (Help)

I saw that, but it's a bit confusing. Also, he uses several different wires and my kit only has two
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Old 01-27-2010, 10:03 AM   #4
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Re: Start engine wires (Help)

hurm, you can use a wire tester to figure out the sequence im sure that fires the starter when the key is turned from "ON" to "START" a chilton or hanes manual might be a quick way to find out. Thats the only real main wire you need, to send the signal.
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Old 02-03-2010, 10:22 AM   #5
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Re: Start engine wires (Help)

Constant 12V+ Yellow or Light Green/Purple Ignition Switch Harness
Starter White/Pink Ignition Switch Harness
Ignition Red/Light Green Ignition Switch Harness
Ignition 2 Gray/Yellow Ignition Switch Harness
Accessory Gray/Yellow Ignition Switch Harness
Tach Light Green/White Power Control Module behind right Kick
Neutral Safety Wire White/Pink Ignition Switch Harness
Brake Switch Red/Green Brake Switch
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Old 02-03-2010, 01:04 PM   #6
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Re: Start engine wires (Help)

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Constant 12V+ Yellow or Light Green/Purple Ignition Switch Harness
Starter White/Pink Ignition Switch Harness
Ignition Red/Light Green Ignition Switch Harness
Ignition 2 Gray/Yellow Ignition Switch Harness
Accessory Gray/Yellow Ignition Switch Harness
Tach Light Green/White Power Control Module behind right Kick
Neutral Safety Wire White/Pink Ignition Switch Harness
Brake Switch Red/Green Brake Switch
awesome thanks OsirisGuy! Now i just have one last problem. the button has two wires that come from it. The tutorial for installing on 05-09 say to cut a green wire and attach one of the button wires to it, and then to attach the remaining wire to the white wire. obviously my colors will be different. so im guessing the green wire is the starter wire, and the white one the power wire???? here is a copy and paste of the 05-09 instructions regarding the wiring:

On the ignition switch connector, there is a GREEN wire on the far outside. You will need to cut this wire loose from the ignition switch connector. Attach this GREEN wire to either wire of the “ENGINE START” push-button pigtail; it does not matter which one.
Note: For this connection, you may use the supplied Quick Disconnect Heat-Shrink Terminals, but for best results, it is recommended that you solder this connection and Heat-Shrink or tape the exposed splice.
Note: Failing to cut this GREEN wire from the connector, will still permit the vehicle to be started with the key.

On the opposite end of the GREEN wire in the ignition switch connector, there is a WHITE wire on the far outside. You will need to SPLICE into this wire with the remaining wire coming from the “ENGINE START” push-button pigtail. DO NOT CUT THIS WHITE WIRE!!!
Note: You may use the supplied Crimp-Lock connector, but for best results, it is recommended to solder this connection and Heat-Shrink or tape the exposed splice.
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Old 02-03-2010, 01:08 PM   #7
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Re: Start engine wires (Help)

better yet, if anyone has a wiring diagram of it... that would be really nice. i cant find one online.
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Old 02-03-2010, 01:49 PM   #8
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Re: Start engine wires (Help)

That's how its sounding to me. My source tells me that 05-09 wire colors are dark green and white with yellow tracer; close I guess.

What you want to do is splice one wire onto the constant +12v and the other wire gets connected to the starter wire on the starter side of your cut
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Old 02-03-2010, 02:00 PM   #9
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Re: Start engine wires (Help)

okay, good to know. So will my wires be the same colors as the ones you listed, or has Ford been changing them up? if they are different colors, i will have no idea which wire is which, and i'll be back to where i started.
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Old 02-03-2010, 02:57 PM   #10
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Re: Start engine wires (Help)

Your wire colors should be the same as listed above, but sometimes manufacturers decide to change it up.

The colors you should concern yourself with are white/Pink and Red[color=light green]lt. green[/color]. ('White' and 'Red' respectively). Red will be spliced into. White you can splice into, which will allow you to still use the key or you can cut it. If you decide to cut the White wire, attach the switch to the wire which will continue down under the dash and under the dash, and on so [this is going towards the starter]. Another way to look at it is the wire will be coming from the ignition cylinder (key cylinder), the part of the wire that is still connected to the ignition cylinder you will want to avoid (connect to the other wire).

If you have a test light or a multimeter you can test your wires (as long as you haven't cut yet or done any other work. Where the ignition wires are you will want to probe each one and find your starter wire and your ignition wire. The ignition wire will give light, or ~12 volts, when the key is turned all the way but before you turn the key to crank the car. If you go ahead and crank the car and the light goes off, or ~12v shows, for a few seconds (as the car cranks and turns over) that is the starter wire.

Just make sure not to cross anything under there.
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