1997 BMW M3 Windows/Sunroof/HVAC Blower not working. - NOT THE RELAY -

[Tjbeaulieu]

Bought a 1997 M3 Coupe with the Windows/Sunroof/ HVAC Blower not working thinking it was an easy fuse/ Relay fix. Not the case... Looks like like a mouse got under the dash while in storage and pissed all over the electrical.
How F***ed am I?

[blckstrm]

Usually it's not the relay, it's the final stage unit that goes bad.

[Tjbeaulieu]

Could that also be affecting the windows and sunroof?

[ScotcH]

Could that also be affecting the windows and sunroof?

no, the FSR is only for the blower ... pretty common failure. The rest sounds like wiring if you're sure all the fuses/relays are good. Possibly as simple as corroded grounds, or if as you say a mouse go in there, it could be damaged wires.