Sir Caleb man . . . . .
Why 'soitanly . . . MULTITUDES . . . . here should likely be able to handle that.
You need ALL of the model info for us to precisely identify the SPECIFIC unit . . the cryptic " FORD / Bose" just doesn't cut it in this situation.
( Nor would it . . . .to a Ford parts counter guy. . . . trying to identify a specific left handed thread giggly pin for a Stromberger carburetor )
Now which of you two would be the most qualified in your techno expertise AND having any /some electro analysis equipment.
Or will you be teamed and working as a dynamic duo . . . .?
Intial suspicion is for the problem going to be heat flex and time related floating solder connections at the pins of a multi pinned, plastic potted, dual channel power AF output module .
Sometimes having the unit dis assembled and playing and doing a moderate tappa-tappa-tappa . . . . in 6 different physical planes . . . . to that module . . . . can aggravate that situation and make that condition show up or vary.
The other situation is the unit being bad internally and needing its replacement.
73's de Edd