headlights on 1990 Cadillac Seville

my headlights on my g20 chevy van went out i thought it was the bulbs so i bought new ones but it didnt work some tell me its the pull switch that turns them on others tell me its the dimmer switch i need to know which is it

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1 answer
if you have a floor dimmer switch, lift the rug and check to see if a signal from the headlight switch is present when pulled out. if it is, then you may have a bad switch or burnt connector. if there is no power, then i would look at the panel switch.

Roy