Check with Greg @ AntiVenom (one of the sponsors here). He's pretty knowlegeable on the C4 and might be able to assist you.
I"m sure someone else here will be as well.
The lights? I know it sounds silly, but did you check the rheostat (sp?).
Might have inadvertantly turned it down. Might be on it's last leg?
Just a guess.
Oh, and you did well.....
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