Amp keeps going into protect

[smashedz28 110]

I hooked up a system for my buddy a year or so ago.. Just 1 Treo 12 and an audio pipe ap1500. Stock electrical. All has been good till yesterday..

His stock battery took a shut so he replaced it. Called me up to help him adjust the deck back where it was. I went through it and when I began turning it up the ampoules cuts out. Goes into protect for about 4 seconds and keeps on playing for another 5 seconds or so and does it again UNTILL I turn it down. I lowered the gain a little bit out of curiosity but same thing..

What can be causing this? Where do I start?

This was a used amp when he bought it on CL so maybe the Amps taking a shit? Any help is appreciated.

[smashedz28 110]

Spell check on this iPhone kicked in a few times. Sorry lol.

[shizzzon 461]

in and out of protect? most likely RCA problem.. Hook up an external source directly to amp such as ipod, etc...

If it still does it, it's damaged.

[pmureika 31]

I would use a volt meter and check your voltages.

[smashedz28 110]

Ok.. That's where I'll start. I got a iPod to RCA cable. I'll start with that. Also check voltage at the amp. I'll post back thanks.

[smashedz28 110]

Crazy... I looked at it after work and it was cutting out bad. Few hrs later I see him again and it's not going into protect... Was that a sign the amp may be going out?