Question about Ford Taurus

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1997 a couple of questions #1 what is the function of the black wire that is cliped on to the key tumbler # 2 what is the function of the electronical box to the side of the battery, what all does this control, # 3 i have a black wire that comes out of the main wiring harness under dash that goes through firewall that goes from black wire then sodered to bare wire what does this black wire control. # 4 my main problem whic i dont know if any of the before has anything to do with it but my car wont start it seems like all the accessories are working but the turn signals but the flashers work , the starter works but when i go to start the car there is no power going to the starter what is going on here

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Take the steering column off. You'll see the ignition, with one big black and one big red wire.The black wire is the ignition switch wire.Connect that wire and then check. Black/Grey -- starter
Yellow -- Accessories
Red/Black -- Key dinger
Red -- 12V+
Green/Yellow -- RUN.
Red is the 12V source. When you put the key in and push it, the Red/Black wire is connected to the 12V+, and it "dings". Next is the ACC position, this connects the red and yellow, I'm not sure what it's purpose is yet, we just got the car and haven't done much with it, but I know the radio will turn on without the key, so that's what the ACC position is usually used for.
The RUN position on the key, the Yellow and Green/Yellow are now connected to the red, and the engine will run.
The Black/Grey is only connected to the red when the key is in the momentary start position.
The momentary is connected to the red and black/grey wires, so when you push the switch, it makes contact between those two.
--------- As you have not mentioned the exact car so it will be bit difficult to give the exact numbers of wires and their colors.Ford 1997.But which ford model of 1997 that is not mentioned.But what is possible with that info that is mentioned. Also the electric control box beside battery can be car computer box called ECM.If can be fuse box connector. But still exact car model will give exact idea of the box. But for troubleshooting i will suggest to get the ignition tumbler wires connected and checked. Keep updated.Thanks.

Posted on Aug 29, 2010

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