I'm looking for a wiring manual for a punch 150 amp

IF you are looking for a schematic diagram on the amp, you wont find it. IF you need the connection information you can look on their site, There is a repair video on that unit attached . Rockford Fosgate Car Stereo Amp Repair

this is the owners instalation manual for the rockford punch P162S. Afret reviewing the instal guide the tweter wire should be black and red red being the positive. typicly the red is positive in most situations.http://www.rockfordfosgate.com/support/rftech.aspx?kbsrc=http://rftech.custhelp.com/cgi-bin/rftech.cfg/php/enduser/std_adp.php?p_faqid=861&p_li=&p_topview=1#knowledge

Sub amps are pretty straight forward.....Hook up you rca cable....then all thats left is you positive (B+) that goes to your battery....the negative that you should hook to a good paint free bolt in your trunk and the remote wire which connects to your stereo.....

Is it the correct size fuse ? Is it the power fuse or remote ? Either way check your connections going into the amp . Try this hook your other amp to the set of wires for the rockford if that amp has a problem its a wireing problem if not chances are its an interal problem on the rockford . Hope this helps !

if you have one that you can compare to another, go to home depot with that and match it up. If not, take the amp to home depot and get someone to help you find the right one.

replace the inputs on ur amp

if your sub will handle it, bridging it will give you more power. The best thing to do is to find out how much power the amp puts out ( RMS ) and if it is in your power handling range bridge it. It sounds better and gives you a harder punch because of more power.

call rockford and send it back for a replacement. These amps have some problems

hows it going so you need it to be installed or you can install this yourself? well the best bet fund to get stuff done cheap is t get the stuf you will need to do an install like a install wiring kit and tools and post a installer help on craigslist.org iin your local area would be the cheapest way or just go to your local audio stereo shop thanks again and i hoope this help have any more questions please feel free to contact me if you need a step by step install i can help you in that and save you big bucks thanks again. always forward jcbproducts

Disconnect the speaker wires from speaker terminals on the amp and turn the amp on (turn the head unit on). Set the volume to zero on the head unit.

Does the amp get hot?

If it does, either the bias is set to high or the amp has other problems. If it does not, you may have the speakers wired to the wrong ohm load.