"Police Dark" Headlight feature - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 18 (permalink) Old 01-09-2017, 10:23 PM Thread Starter
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"Police Dark" Headlight feature

Now that the first of these 6.4's are going on 10yrs old, has anyone stumbled on a non-dealer way to eliminate the annoying 'headlight-upon-unlock' feature? Specific tunes, maybe even easier JUST SNIP A WIRE?


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post #2 of 18 (permalink) Old 01-10-2017, 01:40 AM
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Re: "Police Dark" Headlight feature

Fixed it

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post #3 of 18 (permalink) Old 01-10-2017, 09:06 AM Thread Starter
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Re: "Police Dark" Headlight feature

Lol, just drive with a spotlight out the window for a headlight.


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post #4 of 18 (permalink) Old 01-10-2017, 02:12 PM
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Re: "Police Dark" Headlight feature

Meaning that your headlights come on when you hit the unlock button on the fob?


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post #5 of 18 (permalink) Old 01-10-2017, 02:46 PM
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Re: "Police Dark" Headlight feature

Only way I can think of is ae or possibly forscan.

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post #6 of 18 (permalink) Old 01-10-2017, 04:29 PM
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Re: "Police Dark" Headlight feature

^ that. Or possibly carista.

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post #7 of 18 (permalink) Old 01-11-2017, 06:34 AM Thread Starter
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Re: "Police Dark" Headlight feature

Yeah, the fob 'unlock' does it. Using the key in the door doesn't trip it.


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post #8 of 18 (permalink) Old 01-11-2017, 12:58 PM
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Re: "Police Dark" Headlight feature

Quote:
Originally Posted by Mr_Andy View Post
Yeah, the fob 'unlock' does it. Using the key in the door doesn't trip it.
That would make it a function of the body control module. It's probably the only control wire to that relay and it uses software to figure out when to turn them on, in which case you definitely would not want to cut it.

If it has separate circuits to control the lights, then you could cut it. The problem with that is almost every circuit has a bias in it nowadays. Exactly what a bias is; is just a voltage used by the computer or module for sensing, that's it, that's all it does. It's simply used so the module knows that the circuit is intact. It expects to see 12v at the end of this wire all the time, and if it doesn't, it knows there's a problem and will alert you of a problem, or store a code or whatever have you. it's simply an integrity check of the circuit, a way of monitoring the circuit.

So, if the wire is cut, the bias will not be seen and it'll either store a code for it, or worse, ding at you every so often...which is probably more annoying than the lights in the first place. If I can manage to remember I'll pull up a diagram and see how they're wired at work.

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post #9 of 18 (permalink) Old 01-11-2017, 07:53 PM Thread Starter
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Re: "Police Dark" Headlight feature

08 XLT SC


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post #10 of 18 (permalink) Old 01-11-2017, 09:17 PM
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Re: "Police Dark" Headlight feature

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Originally Posted by Mr_Andy View Post
Lol, just drive with a spotlight out the window for a headlight.
Been there done that. And it was about 0 degrees so my hand was a little bit chilly
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