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Old 03-09-2011, 04:34 PM
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Radio wiring problems...

Hi guys, I just bought a 99 f250 reg cab 4x4 xlt. The previous owner just cut all the wires behind the plug for the headunit. So now I have multiple wires and no idea which ones go where. I have found ground, and what i believe is the battery/power wire. I get about .51 volts when the key is off and when I turn the key on I have 12.+ So I have this hooked to my yellow wire on my head unit, and my ground connected also. I cant figure out which wire is my ignition. If I touch my red wire from my head unit to every wire in the harness the unit never comes on. Ive tried on two seperate units that I know both work. Anyways does any one have some good wiring diagrams? Ive been searching for a couple days and cant seem to find a diagram that matches my wires. Also im not aware of if the truck originally had a cd, just am fm, etc. thank you for any help
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Old 03-10-2011, 07:52 PM
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Most of them should be color coded from an aftermarket harness. I know the Walmart brand comes in the the package with the wire colors if you already have a harness might as well just buy the one from there look at it then take it back. Hope it helps. Good luck
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Old 03-10-2011, 08:04 PM
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Since I have my wiring harness package laying around for my 2000 F350 maybe its the same for yours.

red: 12 volt ignition/acc
yellow: 12 volt battery/memory
black*: ground (*=ground aftermarket radio to chassis of vehicle, if black wire is not present)
blue: power antenna
blue/white: amp turn-on
black/white: amp ground
orange: illumination
orange/white: dimmer +
orange/black: dimmer -
brown: phone mute
gray: right front +
gray/black: right front -
white: left front +
white/black: left front -
violet: right rear +
violet/black: right rear -
green: left rear +
green/black: left rear -

Packaging is also in Spanish. If you want them in espanol, tough luck. Hope these color codes work for ya
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Old 03-10-2011, 08:24 PM
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Those color wires are the colors of all aftermarket wiring (harnesses and radios), not the truck's factory wiring.

5004, your "yellow" wire should have 12v+ at all times.
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