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Old 04-17-2013, 11:17   #1 (permalink)
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2012/2013 Focus brake light wiring diagram

My Focus brake lights will not illuminate unless the ignition switch is in the "ON" position and my supplemental brake system requires a brake signal for operation. Hence my problem.
I am setting up my 2013 Focus for towing behind my motorhome, which requires the brake lights to illuminate when the pedal is pressed without the ignition switch being in the "ON" position.
In order to do this I require a wiring diagram showing the 4 wires going to the brake light switch so I can determine which wire supplies power to the switch when the ignition switch is in the "ON" position and what wire/wires goes/go to the brake lights so I can tap a signal to my supplemental brake system.
Can anyone help me with this?

Thank you very much.
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Old 04-19-2013, 16:59   #2 (permalink)
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Re: 2012/2013 Focus brake light wiring diagram

The diagram
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File Type: jpg Stop.jpg (41.8 KB, 28 views)
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Old 04-20-2013, 06:32   #3 (permalink)
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Re: 2012/2013 Focus brake light wiring diagram

Thanks Bert.
May Impose on you to give me the schematic for the brake lights (I don't understand where exactly the power for them comes from)?

Bob
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Old 04-20-2013, 07:48   #4 (permalink)
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Re: 2012/2013 Focus brake light wiring diagram

Doesn't it have LED tail lights? Have you considered this set up? Tow Bar Wiring for 2012 Ford Focus - Roadmaster RM-155
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Old 04-20-2013, 08:22   #5 (permalink)
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Re: 2012/2013 Focus brake light wiring diagram

Sure have considerd that, Bert.
But they won't solve my problem, which is my Even Brake requires a 12VDC signal from the brake lights when it pushes the brake pedal. I can't supply that signal because there's no 12VDC signal from the Focus brake lights unless the key is in the "Run" position. Obviously I can't do that because all the electronics, including the odometer, will be in operational mode.
So, I must determine which lead to the brake light switch is provided with 12VDC when the key is in the "Run" position. Then I can provide 12VDC to the proper lead of the brake light switch so the brake lights illuminate when the pedal is pushed without the key being in the vehicle when under tow. From there I can tap a signal to the Even Brake and all will be well in River City.

And no, it does not have LED Stop/Turn/Tail lights.
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Old 04-20-2013, 12:00   #6 (permalink)
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Re: 2012/2013 Focus brake light wiring diagram

The green/red wire is hot at all times. I turned the diagram so it's easier to read.
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Old 04-20-2013, 12:35   #7 (permalink)
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Re: 2012/2013 Focus brake light wiring diagram

Thanks Bert.
I did that too and will check for power at the stop light switch connector (if I can squeeze into the space).
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