There's lots of expert advice available on the site but without more information regarding your problem it's hard for us to even get you started with a diagnoses.
What are you working on (year and model)?
Was it running and now it's not?
Do you have power to anything else?
We'll need more information before anyone will jump in here and advise. It's probably a good reason why we suggest you introduce yourself to the membership, tell us your interests and abilities in your first post. Pics always helps.
