Instrument Lights Off when Headlights on

[sunset]

Just came back from a weekend Field Trial hauling horses when I noticed that my 2002 F350 4X4 instrument lights turned off when I turned on my head lights.

Any ideas what caused this???

[2006KR]

Not to be a smart a$$, but I have to ask .... is your instrument cluster dimmer turned off? Had the same problem, and almost headed to my dealer, but decided to check one last thing. Yup, my grandson had been playing around 'pretending' to be a truck driver, and turned the dimmer off.

Hope yours is that simple to fix.

Larry

[turbotime]

Other than some kind of short....or what 2006KR had to say. Hopefully it is just that. Good luck to ya

[purduefarmboy460]

Check all fueses as well, I had a prob with the headlights turning on and the parking lights going out (including dash) if I wiggled the switch, they would all come on, it ended up being a fuse...

[sunset]

I cheked all fuses an dswitches and made an appointment for service [advisor thought switch must have failed] but problem cleared itself when I reprogrammed my Hypertech stage 1 setting to factory spec. I'll rag on Hypertech for this .

[Matt Muir]

I have that kind of stuff happen when towing. Almost always was some wire or bad ground on the trailer causing it