Are the speakers in a 05 D22 fused? The 10 amp audio fuse in the cab is fine... The head unit runs fine, The 10amp audio fuse in the engine bay fuse box continues to blow and only one speaker works but every now and then the other one will kick in. i have never had a stereo with speakers running a fuse.The only thing I can think of is a exposed wire running to the speakers causing a short. Any ideas before I pull the nav apart?