Audio Systems: 95 Jeep Laredo Radio Install, jeep laredo, fuse box

Question
Ernesto...
Just to reiterate...
QUESTION:   Thank you for your follow up. I did not use the
harness, because the original harness was cut from the
previous owner. Anyway, I tried it, attaching the blue wire
for the amp to the wire that was at pin G, but nothing
changed. I verified the blue wire was hot when the radio is
on, and I tried connecting it to every wire I did not use
from the Jeep and still nothing. I am at a loss. Is there a
fuse for the amps someplace?

Answer:  YES THERE IS in the fuse box it is call back up.

MY NEXT QUESTION: I could not find a fuse labeled "back up"
only two fuses are related to the radio and both are fine.
Any other options for why the speakers are not working?

Answer
OPEN ONE DOOR PULL THE SPEAKER AND CHECK WITH A A TESTER
2 wires will have audio output, the other 2 are power 12 volts  there is also a relay inside the radio space in the dash ,
this relay turns on all 4 amplifiers  look for it and make sure there is power there

good luck