I cant garentee what i have written to be correct,
but i am just informing you of a problem had with our old VR Statesman which sounds very similar.
The certainty about the windscreen valance as apparently when the auto elec took it off, he left it off until the part arrived, leaving us driving around for 4 days with none. Thats why we are sure of its location.
Remember, it doesnt cost to ask questions and as for manuals, its probably limited as the fan amplifier would only be on those with climate control, and the manuals are usually based on the base model commodore.
See how ya go anyway :wave: