Q: how can I dim/turn off the headlights when the ignition is on? on 2007 Dodge Sprinter 3500

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to signal other drivers at night it is usefull to be able to turn the headlights off momentarily, and gate guards appreciate the courtesy when driving onto a military facility. I thought the easiest way would be a dimmer switch under my left foot but I can't seem to isolate (find) the wire. The fuse marked headlights located on the steering column does NOT turn the lights off when pulled. I've tried to find a wiring diagram for my Winnebago View/Sprinter but haven't found a source. Thanks ,Gordon
(2) Answers
Probably not going to be able to tap into the wiring, but you can have fog lights installed with a toggle and switch them on and off to signal.
we put a toggle hard wire at the head light bulb, no lights during the day , or if van is running at a truck stop, if you turn the lights on you can use the fog lights in rain.