1990 GS
My heater and fan controls were working fine, and then one day, the fan does not work. Wline my lights are on, if I turn the fan to 1, the lights on the dash dim a bit, and then to 2 and they dim a bit more and so on. I know there is current through there and the fuse is fine. Would I need to replace the fan itself or is there somethisnelse I can check? Also my vent selector is hard to select seeing as how the contact solder points have broken (searched). Would this interact with the fan in anyway?

Also
My muffler fell off last night (probably 10 years old. Im not looking for anyhitng insane performance wize, but is there someplace I can get a stainless catback system that will bolt up? Im looking for OEM or a bit oversized. NO loud mufflers. Keep in on the cheap.

TIA.