RedNut,
Did you check wires/connections from Radio to speakers especially ground wires/connections.
Usually the material around magnet will have crack or tear in it if speaker is shot.
Also I have seen where the wires(very thin) going to material(speaker) broken.
Looking at 96 manual speakers are grounded thru radio.
Resistance of (+)and (-) connections on speakers is between 3 and 8 ohms.
My two door speakers are working great. In Past vehilces the door speakers were the first to go. I think this is caused by constant jolts(door closing)also better chance of moisture to get to them.
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Bill Thomas
Missouri Mule - 96 Wht 4X4 ST CC,5 spd, 3. 54, 8 ft bed, 1 ft high cheater boards.
99 Freightliner bl/wht FL60 ISB-5. 9 24v,215 hp,520 tq,6 spd, 3. 59 nsr,16 ft box, 19. 5 tires,Wt/gvw 11,000/23000