I have an 89 Blazer and I burned up my second blower motor switch. I cannot adjust the blower speed at all. I think that the switch relays are bad and they are buring up the switch on the dash. Does this sound right? If the relays are the problem, where are they? I think that there is one in the engine compartment right by the blower motor, but I have no idea where the second relay is. The high for today is 113 degrees, so as you can see I need to get this fixed fast. Thanks for your help!!!