Light switch modification - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 03-12-2018
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Icon5 Light switch modification

Is it possible to internally modify the headlight switch SW6645, so that the daytime/parking lights are moved from 'position' 2 to 3? Or, move the headlight switch stop-position from 3 to 2?
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Old 03-12-2018
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No, probably not

What year Ranger?

Picture of 6645 switch here: https://www.ebay.ca/itm/OEM-New-2010...tS~Y-6&vxp=mtr

Is that what you have?

I assume whatever you have, position 1 is OFF, 2 Parking lights, 3 Headlights
Daylight running lights are a separate module

You could reverse 2 and 3 by cutting and reconnecting wires on the back, they probably just run Relays.

But 1 is OFF so has no connection on the back to rewire
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Old 03-12-2018
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Yes RonD, the switch there at ebay is the one that I have. My year is 2007. And 1 is off, 2 is parking, 3 is headlights.

So, are you saying that if i switch pins 2 and 3; position 2 would be headlights and 3 parking? I do hear a relay 'click' when setting it to factory position 2. If they are both set to a relay, would it not matter the reverse you talk about, and therein not be possible to 'flip' them?
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Old 03-13-2018
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3 would always power 2 relays, parking and headlight
2 would just power parking

So you would have to ID parking and headlight relay wires, used a diode on parking light wire and connect both to 2 out
Then just parking to 3 out, diode prevents 3 out from activating headlight relay


Seems like a lot of work for no difference?
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Old 03-13-2018
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Well Ron, I just looked at my wire diagram book, and if you are referring to the switch wire connector wires; there is no wire used in pin hole 2. And 3 is a ground pin.

Pin 1 is control module right turn lamp
Pin 2 is not used/present
Pin 3 is ground at seat bracket
Pin 4 is not used/present
Pin 5 is park lamp relay
Pin 6 is fuse 23
Pin 7 is not used/present
Pin 8 is illumination
Pin 9 is fog lamp switch
Pin 10 is fuse 23

So, were you meaning the wires at the connector (C205) or some other wires? At 205, there is no wire number 2; or 4 or 7 either.
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Old 03-13-2018
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I was talking about position 1, 2 and 3 on the switch as you rotate it

Per your post: "moved from 'position' 2 to 3? Or, move the headlight switch stop-position from 3 to 2? "

No idea what the wiring connections would be on the back
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Old 03-13-2018
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i have opened the switch before and there are no wires inside. its a sort of stepping per each turn. each 'step' engages or disengages positions of the switch. the steps are either bent, pressed or pushed on by tiny parts of the switch pieces. and i dont think there would be room for any extra wires or added diodes inside; that wouldnt already hamper the turnability of the switch, operation of the 'steps' or even the reassembly as a whole.

ive looked at the wires that are on my connector and there are just the two for the fuse, another for fog lights (which i never had installed, and neither a position on my switch), wire for the ground, the relay, and the 'control module' (?) for the right turn lamp. --i dont see how a headlight switch would have anything to do with the turn lamps as those are controlled by the multifunction switch at the steering column. and even if the powertrain control module had association with the turn signals, why it would have any connection to the headlight switch; if "CTRL MOD" has any relevance to that.

so is it then, not simply reversing wires on the connector, per the 10 i listed before; with the diodes attached there?
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Old 03-14-2018
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Could someone please explain to me, what pin 1 (CTRL MOD - RIGHT TURN LAMP) is for, in light switch connector C205. It seems wholly unrelated to anything headlight related. Especially as the light switch itself, has nothing to do with any 'turn lamps'.

Then, if it has any supposed connection to the headlights, why is there just a CTRL MOD - RIGHT TURN LAMP, and not a LEFT TURN LAMP? I do not see anywhere in my Ranger wire diagram book any wire pertaining to CTRL MOD - LEFT TURN LAMP.
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