Well, I guess I was wrong. Two things that they said were wrong with it.

For the check engine light issue, they said that the problem was that the relay control module was bad, so they have to replace it. I'm wondering if I somehow indirectly damaged that when I was playing with all of the fuses in there .

As for the dome light issue, he said that there is a short in the dome light housing, and that the part to replace it is $1100.

Luckily, I have a warranty through my bank where I have the loan for the car, so I will just have to pay a $250 deductible for all the work, but holy **** is that alot for a part. Either way though, they can't do anything until monday because once again, they were slow in calling people, and the warranty place is in Chicago, and was closed when they tried to call from California. So I really hope that both issues will be covered, or else I'll still have to pay 270 for them to do the dome light diagnostic and pull the codes from CEL and end up with a car that is still having issues.