I have a 98 ford expedition Edddie Baur the radio works, the sub amp works, the primary or main amp is out, I think. All the controls on the radio work but no sound comes thru to any of the speakers. All I can get is a low buzz when the volumne is turned all the way up. I checked both areas for fuses under the dash and under the hood. they were OK. I took most of the dash out but could not get to the amp that's located below and down from the radio without removing what seamed to be everything. I wanted to now if there is any information I can get to explain or show me how to remove it. I don't want to get so much stuff taken out that I can't get it all back. It's very costly to take in and thought if I had a how to book or procedure I could do it myself. So far all I was willing to remove was the pannel for the radio, the radio, the pannel that hold the rest of the dash controls, the pannel under the streeing column, the top of the center consel. I did removal everything to check the sub woofer in the rear
but that doesn't apear to have enough connections on the plug to be the problem. or can it even if it doesn't carry all of the speaker wires. I did take the radio in and had it checked it checked out fine.
