1997 Dodge Ram

I have a 1997 dodge ram and when I am driving down the road my lights just go out, before I could hold the dimmer switch back and they would come on and now when I try to turn the actual light switch on they keep going out and holding the dimmer switch back wont keep them on anymore. Can you please tell me what my problem is, is it in the dimmer switch or is it in the actual light turn on switch. Please help
thank you
February 9, 2007.

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