Headlight switch

[jacknife]

2014 3500
Headlight switch is not turning off lights. I have to repeatedly turn off and on switch to auto makes no difference. Finally it responds and the lights turn off.
Even locking and unlocking turning on and off the alarm doesn't seem to matter. Any thoughts ?

 

[Bob4x4]

The headlights stay on by default.It is a computer controlled system,without a good scanner that can see the entire system it will be a crap shoot

 

[jacknife]

Thanks for the info. Going into the shop tomorrow .