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1979-2004 V6 Mustang Tech Discussions

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Unread 08-07-2013   #1 (permalink)
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Default How wire reverse glow gauges? 2002 mustang

I bought Reverse glow gauges from American Muscle made by Stack Racing. I've read like 20 other forum posts about these and I still need help with the wiring. I connected the positive red wire to the brown wire.(most of the forums said to connect it to the brown but that's because they didn't have a gray one, which I do.) I've electrical taped the negative black wire to the large metal cylinder behind the gauge cluster. And as far as I know everything works...but when the car turns on...the gauges turn on. I'm sorry. When the battery is hooked up the gauges turn on. So unless I unhook my battery every time, my gauges will always stay on. Do I need to change the red wire? How do I turn them off?
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Unread 08-07-2013   #2 (permalink)
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they have a dimmer switch with them, is that set to always on or off, or what? If not using that then I suggest you wire them into the factory dimmer switch so that they only illuminate when you have lights on.

IE there is a blue wire with a red stripe coming off of the dimmer. Supply the power to the gauges from that, negating the use of the supplied dimmer. Then ground to the chassis. I suggest a ring terminal on a bolt as the vibration could cause a soldered on ground to break off. Hope this helps.
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Unread 08-07-2013   #3 (permalink)
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Idk. You turn the switch one way and it makes the gauges bright and buzz. The other way just turns them down.
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Unread 08-07-2013   #4 (permalink)
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try wiring the red wire to the blue and red wire and that should fix it
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Unread 08-07-2013   #5 (permalink)
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you hooked the red wire to the wrong wire, a wire that's always hot. it needs to be the one that's only hot for parking or head lights.
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Unread 08-07-2013   #6 (permalink)
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^hence why I said the blue/red wire that is the dimmer control. It is only hot when the lights are on and allows control of the voltage so you dont have to use the supplied dimmer from the kit, making it so you do not need to cut holes or anything of that nature in your trim.
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Go: CAI, True Duals with flowmaster super 44's, Bama Tune, full suspension (lowered, 8.8, 4.10s, UCA, LCA, springs, CC plates)
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Unread 08-07-2013   #7 (permalink)
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I have a picture of the wires and I don't know how to post pictures on here. I think there is a red and blue wire in the back just to make sure thats what you are talking about. I'm on my phone but not on the app or mobile.
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Unread 08-08-2013   #8 (permalink)
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I've looked at the wires and I have found a red and blue wire. So ill try to connect the red wire to that one soon. About the black or grounding wire, can I just connect that wire to a wire that stays hot? If I'm right, and you've probably already said it, but the red wire is connected to a brown wire which if the battery is on, the brown wire is on. Can I connect the black wire to that??
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Unread 08-08-2013   #9 (permalink)
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the black wire is GROUND. NEVER connect a ground to a HOT wire, EVER. The black wire should either be spliced into an existing ground (harder option) or put a ring terminal on the end of it, and put it on a bolt so that it is grounded to the chasis. If you put the ground to a hot wire everything will be all sorts of messed up, and you will most likely short things or even break the gauges.

You should also put a small (5 amp or less) fuse in line with the red wire just in case.
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Go: CAI, True Duals with flowmaster super 44's, Bama Tune, full suspension (lowered, 8.8, 4.10s, UCA, LCA, springs, CC plates)
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Unread 08-08-2013   #10 (permalink)
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ok so explain to me why you put it on the brown wire when the instructions say to attach the red wire to the gray wire..
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Best 1/4 time: 15.036 @90.92mph, 2.148 60'
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Unread 08-08-2013   #11 (permalink)
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  • 1. I've read a lot of other forums saying the instructions are wrong and to do the brown wire instead.
  • 2. After 4 hours I attached the red wire to the blue and red wire. I imagined that when you pulled out the headlight knob and twist, the gauges would light up. The headlight knob has no ******* effect on the lights...only the dimmer switch does.
  • 3. Tonight I'll hopefully see to be able to tell if the dimmer switch actually turns it off/on I'm it sure it adjusts the brightness and will be draining my battery.
is there another wire I can attach it to?
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Unread 08-08-2013   #12 (permalink)
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I would edit but it wants me to give a reason to why I want to edit and idk. But I just wanted to say thank you guys for the help and maybe I can try the gray wire and see what happens. I don't have work tomorrow so ill have all day. Also I found a bolt across from the wires and attached the black one to that. So there goes my grounding confusion!
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Unread 08-08-2013   #13 (permalink)
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if you use the supplied dimmer and tie it in to factory headlight knob/dimmer then the supplied dimmer will actually dim or brighten but it will only be powered when the factory knob is pulled. That is how it should be.
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Go: CAI, True Duals with flowmaster super 44's, Bama Tune, full suspension (lowered, 8.8, 4.10s, UCA, LCA, springs, CC plates)
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Unread 08-08-2013   #14 (permalink)
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Well how do I know which one is the factory dimmer?
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Unread 08-08-2013   #15 (permalink)
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If I sent you a picture of the box thing, which show what slots the wires are connected to, could you tell me which one is the headlight/dimmer switch?
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