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Re: ford fiesta 2004
Ok go to parts store and get a 12v probe tester its cheap! when you get back with it take the claw part of it and grab some metal that has no paint on it somewere around those wires like a bolt or somthing that is part of the cars metal . now go turn the key on and start the car. go back to the black wires and start probing them when you get a light that comes on on that probe you just bought label it postive . there is not a lot of wires here so the next one will be labels ground. now with some help put some one in the car and have them push the break down then start to probe agen on those black wires with the break down one of those wires should light up now this is the break wire should be blue start conecting these with but caps bye these too while you r at the parts store . and feel free to ask them to while you r there about this . between me and them you will better under stand and you will solve this.
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If you have or can get a repair manual, it should have an electrical diagram of the wiring for the locking system on your vehicle. However, if its just a remote locking system for your car doors (I'm assuming that's what this is) then you need only wire it up fitting your current locking system. You will have Power (Red), Source (Yellow), ground (black) and if like a stereo system you'll need a "remote wire" which is a smaller Blue wire which would connect to the ignition IF you have auto locking doors after you put your vehicle into drive and they lock after so much time 10-15 sec or so. If not, there should be no remote wire needed.
you can buy,well we can,adaptor plugs to connect to the h/unit and to the wiring loom plug.normally its yellow=constant power 12v +,red=ignition feed 12v+,[some are other way round]black=earth,blue=power antennae,grey/greyblack,RF speaker,white/whiteblack,LH speaker,Purple/purple black,RR speaker andgreen/green black LR,,orange =illumination dash lights.Those are our standard colour codings,we get in New Zealand.
I looked at my schematics, and they don't show a relay. They do, however, show two ground wires coming out of the tailgate window switch. There is a ground wire for the "up" side of the switch, and a ground wire for the "down"side. These would be color-coded black, and I think that it is worth checking to make sure you don't have a corroded /broken ground running from the tailgate switch. If only one grounding wire was broken, the window would operate in only one direction. Both dash and tailgate switches share the same wiring circuit, and these wires are "hot" all the time. It's normal when you get both sides of the motor leads at 12VDC when neither switch is activated. These switches function by switching off one of the two motor leads, and connecting it to ground, thus allowing power to flow thru the motor windings. Of course, reversing the polarity on a DC motor will change the direction of rotation, so changing which black lead is switched to ground gives the up or down direction to the motor.. since you can read schematics, you might check out ebay for a used Haynes manual cheap. hope this helps
You have already solved your problem. Connect the two ground points with good flexible wire and tie it up with plastic ties so that it is out of the way and near a hinge so that there is minimal movement. The original scheme probably relied on conduction through the hinges for grounding.
if you are looking to put a new stero in the best thing to do is go to radio shack or the parts house and spend 5 or 10 dollars and get a wiring adapter. You can wire the thing in your house all the colors are the same and then you just walk out to your car plug it in and go. It is worth the money it is pretty cheap anyway.