drop in voltage when blower fan on?

When I turn on my air conditioning, or vent, I notice a 1-2 volt drop in voltage on the dash meter.

I don't recall it being this significant before and I wonder if this is due to some condensation water possibly being in the case of the blower motor?

any ideas as to whether this is an issue and what I could do to fix it?

its normal to notice a small drop in voltage when you turn on a load like the blower. I would have to say that its a normal response. Unless you are experiencing other problems?