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[troverman]

This might be your problem: Each door speaker has a separate amplifier which powers the speakers in that door. The head unit only sends a preamp signal. This would be the small amount of sound coming from your doors. On my 95 4.0SE, all of the speakers and the sub on the driver's side (US) would not work. This led me to the following fix: Even though power is supplied to the door amps at all times when the ignition is on, there is an amp trigger wire which actually turns them on. You might notice a small delay when you power the head unit on and when the loud sound actually is heard. This is that trip wire turning on the amps. It delays so you don't hear a thump through the sub and the speakers. If there is a break somewhere, or a short, you will get no sound. The wire runs under the door plastic sills with a mess of other wiring. It is a single black wire (at least in 95) Take the door panel off, find the amp (On mine it is a small black metal box with a wiring clip bolted to the door.) Trace the wires in the clip: most will go to the speakers in the door. You should be left with three wires: a ground wire, a constant 12v+ with ignition in I or II position, and the amp trigger wire. If you can find these wires, do this: test with radio off ignition in I or II. You should have a ground at the ground wire at all times, and with they key on you should have 12V+ at that [constant power] wire. The other wire should have nothing. Now turn the radio on with the key on, and test [the amp trigger wire]: Should be 12V+. It won't be if I'm right. If there isn't, you can spend hours or days taking your car apart trying to find the broken wire, or you can trace it on the back of the radio head unit. It will be the same color / thickness as the one on the amp. Probe into the wire with a meter and see if with the radio on there is 12V, with the radio off 0volts. If this is the case, cut the trigger wire, leaving enough wire, and then run a new wire from the head unit to the amp. That is what I did, fixed the problem fine.

On the other hand, if this is not the problem (12v+ appears at trigger wire on amp with radio on) you could have an amp problem, or you could try the following: find the mode button you push to change bass / treb / balance, etc. Push and hold until you here a beep and the radio resets to the factory bass / treb / balance / fade, etc.

Good Luck