'03 headlights on all the time with engine running !
 

Have an '03 that's been sitting in yard since Feb. Had to charge battery a couple of times but have tried to start once a week to keep charged. Noticed the last time I started it the headlights were on and the switch wasn't. Also, turn signals didn't work, when I put high beams on the indicator came on then went out. Instrument cluster not lit very much and turning the switch knob didn't make any difference. i haven't had time to check if brake lights were working because I was alone at the time. Any suggestions ???
Thanks, spence

corroded or rusty ground. Pull the dash bezel and remove the light switch completely - as in, unplug it. See if any brightnesses change. Unplugging the lamp controller should turn all exterior lights on and interior lamps should go full brightness I believe.

yep
i have a parasitic draw in my dimmer (potentiometer) or (variable resistor) Dial. I make it a habit to keep the dimmer dial/switch all the way off otherwise it will draw on the battery.
Also I try to make it a habit to cut off the lights before i turn off the truck. otherwise the lights stay on a ridiculous amount of time.

Why not just change the switch?

On a meager fixed income, currently saving for tires. ;)