2001 maxima stereo install issues

[9999]

Hey gang, I just hooked up an aftermarket HU, subs, and amp (which Ive had in a few cars before this, so Ive had no problem hooking it up before). But for some reason, my subs wont come on? The power light on the amp is coming on, the HU works fine, yet no power is going to my subs. Is there something extra I have to do to let the factory amp power the speakers and my amp powering the subs?

[huda424]

it sounds to me like your not getting signal or speakers are grounded. did you check your rca and the output of the radio. it always good to make sure all the wires are hooked up and not grounded out. if its grounded you will not hear anything.

[92socal240]

Some decks require you to turn the sub pre-out on.. My Alpine is like that so every time I unhook the battery I have to hold down the CD eject for 5 seconds and the sub-out comes back on.