No sounds wiring and power ok but no sound. Fuse is ok as well. Truck does not have an amplifier. What would cause this?

Are the internal speakers properly connected via the rear-mounted 1/4 inch "Speaker Output" jack? If so and still no sound, try connecting a separate external speaker (floor monitor, pa cabinet) for a "low volume" test.

The OM says the internal speakers are 4 ohm so it's unlikely that a wiring problem with speaker connections would cause all four to stop working. With AC power disconnected from outlet check for an internal speaker protection fuse BUT be careful. Charged capacitors can hold a charge for weeks!!!

It sounds like you are using an amplifier. Make sure you are using the blue/white wire to turn the amplifier on. The blue/white wire is amplifier remote turn on and the blue wire is power antenna remote turn on. The blue wire turns off when leaving tuner mode, turning the amplifier off.

take a multi tester and test the + and - of the amp if there is power Check the fuses. if that is ok it means that the power IC on the amp Blew.

Bad ground sounds like you may have paint or undercoating stopping the ground from making good contact or unhook the remote wire and run a small wire from the main power to the remote hook up and see if it works ...... May have a faulty remote

usually this happens because A: The speaker wires are shorted, B: if not this then usually the "Output" devices, the IC's or transistors that "Drive" the speakers has faulted, a very common occurance, it also may be a polarity issues. Check for shorts on the speaker wires make sure the wires for power are ok.

HAVE YOU CHECKED ALL OF YOUR SEAKER WIRES AS IT SOUNDS LIKE THAT IT WHATS WRONG

run 12 volt into your rem terminal and see if it comes on if it does your remote wire coming from the headunit is bad or cut

Sounds like you popped a fuse my man. Check your Manual on how to replace them.

It sounds like your saying that you have two identical amp, that both are on the same power wires and remote wires and sam grounds? Well if thats the case then you did ok as One amp sounds like its blown. First tghing is check the main fuse. If its good and the unit still dosent resond then the power supply in the amp is blown as theres a switching supply that increases the 12 volts to get power to drive the Mosfet output devices. Was it ever working?? yes then the amp needs service. Do you know how to work on solid state elctronics down to componet level?? No?? Ok contact these folks at the addy im posting for you or take the amp to your local servicer. Good Luck. [email protected]