Dash lights and others not working
Other than that, you're going to have to go looking for a break somewhere in the gray wire from the dimmer switch because all the dash lights feed off of that.
As far as the front DRL/signal light goes, if you're not getting power on the blue wire when the turn signal is on then you'll have to trace for a break in the wire someplace between the socket and the DRL module under the dash. It is also possible that the DRL module itself is bad - test for power going in on the dark blue with white wire and coming out on the dark blue wire.
So yes, the courtesy lights portion would still work if the IP DIMMER fuse was blown. Of course, in the time it took to post and get an answer, you could have just checked the fuse.





