here what i did,
i rewire the speakers to the amp
installed new amp

while driving, radio turned off, check fuse under hood good
check under dash #28 blown, put new one, blown again.

pls let me know where/how to check

hope its not my (after market) Head Unit its expensive
tnx guys

 

Check all your grounds to make sure that its got a solid Bare metal connection. Also on your amp, make sure the Red Power wire isn't touching anything, Along with the Ground coming from the amp. Maybe you got the wires switched by accident?

 

im pretty sure the wire is where it should be because it was working.

 

radio now working, but parking break is always ON!