Headlights only work on auto

[Leigh123]

Hi wondering if anyone can help I have a 2014 dodge Ram 1500 and my headlights only work on auto.As soon as move switch to on position no headlights.I have already replaced to switch and made no difference.

 

[HarryS]

Everything goes through the BCM. The signal from the headlight switch is a mux signal, there are only 2 wires from the headlight switch, so, if it works in auto, but not manually selecting the headlights, that points to a defective BCM.

 

[Leigh123]

Thank you