I recently was swaping out my amp for a Nakamichi pa-1002 to run my sub instead of running my rear speakers but when I put the Nakamichi in it went into protect after a few seconds ...I checked to see if it was my sub wiring but wasn't then stripped the amp down to basics and still protect mode so i assumed it was dead... got it for free anyway. After that I installed my original amp back in which was working when I took it out now it does the same thing so I figured maybe a grounding issue but every thing seems to check out I even tried testing with a power supply but still goes into protect. I even tried a shitty amp which I knew worked also and nope same thing..... they are all older amps...

Can anyone tell me what could cause this? I am going to rewire everything because the previous owner of the car did a hack job, but before I even hook another amp to it I need to know what does it...

 

grounding issue is where i would look 1st
then
look at the speaker wires

ps need to ask did you flip the +/-

 

grounding issue
or
bad speaker wire
but need to ask did you flip the +/-

 

nope positive I didnt flip the +/-

Wouldnt the amp power on atleast in its most basic state just power/ground/rem? They go into protect as soon as they have power no green light what so ever. I tried it on battery so grounding wouldnt have been an issue.

 

look at the speaker wire

 

I will try that but its pretty good speaker wire 12guage and 8guage power and ground. Wouldn't the amp still power up without anything connected besides power/ground/rem on a test battery outside of the car??