I have the stock JBL system in my Mark , my rear speakers play but I need to set to nearly full rear to balance .My fronts blow me away and sound outstanding ... So here is my question are the rears going through the amp on the rear deck , could both rear speakers be bad ? They sound ok , just like they are not amplified... Does anyone have a diagram of the wiring for the amp and speakers ?Where is Driller when I need him....

It looks like the rear speakers come off the amp. The '96 service manual says if your fader isn't working properly and your speakers are then the radio chassis should be removed for servicing.

Thanks mach8 , the fader seems to be ok , I think there is some problem with the amp , only on the rears...I havent had a chance to get in there and look yet ......

Does anyone have a diagram of the wiring for the amp and speakers 96 Mark VIII ? Where is Driller when I need him....