Light bulbs burning out one after the other

[70Sixter]

RR311 sounds right. Or you could be getting a surge related to the DRL install, since that preceded your unholy manifestations. Multiple multimeter checks needed.

If electrics are ok I'd consider the ignition switch. It has caused some mighty weird problems.

After that an exorcism is likely in order. Watch out for pea soup!

[Jacques79]

Now the radio is not producing sound anymore...it seems to be working but there is no sound coming out!

I don't have the time to go to the dealer...can the ignition switch cause this problem too?

thanks