Headlight and tail light problem

[Mangler]

I have an 04 Ram 2500, and just recently noticed the left tail light ON when the truck was off. I did some digging, and this is what I found.

1) with the ignition on, and headlights turned off - the headlights and tail lights are ON (except center high lamp). The headlamp switch on/off doesn't change the condition.

2) with the ignition off (keys out), the left tail light is on(brake light only). I press the brake and only the center high lamp turns on. Headlight switch on/off has no effect.

3) With the ignition on, turn signals don't function.



After looking at the manual, I should start by replacing the headlamp switch. Next I should consider the FCM.



I want to hear if anyone has any suggestions before I replace the headlamp switch?



Thanks!

 

[Road Dog]

You can start with a reboot -- disconnect the batteries for a few minutes.

 

[Mangler]

Thanks for the help.

I replaced the switch, and did the reboot - and everything is fine. Not sure what fixed the problem. I am wondering if it was the reboot, why, and what could be going out? I haven't had much time to really look the problem with a baby keeping me busy! Thanks again.