Don't take this the wrong way; here comes a lecture from someone who makes his living working on automotive electrical systems-
1- When asking for advice, please provide all vehicle info; year, make, model, and any options(like A/C) that are pertinent to the problem.
2- Also please tell us what you've recently changed, and what you've checked so far(you did do this, thank you).
3- There is no substitute for a little investigation work with a meter or test light. It doesn't have to be fancy; an old tail light socket and bulb will work in a pinch.
4- Don't just throw parts at it and hope to stumble upon the problem. Expensive AND frustrating.
5- When you do find the problem, please let the Forum members know what it was and your solution.
I try to help out on here whenever I can with electrical problems, but only check in early morning and late evening; response time will vary.