So I replaced the ignition switch yesterday and the DRL seem to be working normally now. Fan speed 1-4 is now working, so the switch certainly was the issue......but. Now speed 5 is not working at all?? I can only assume it is the blower resistor but that does not make sense to me as I thought the resistor was to control 1-4 and that 5 was bypassing the resistor. I replaced the resistor about 3yrs ago.
I have not read of this happening to others......

Any suggestions?

Thanks in advance