Car Stereos: Car amplifier, car amplifier, audio cables

Question
I've just installed an amp. in car and I took the proper steps to insure I woundn't short circuit n e thing...I have good ground, power directly to battery and new fuses but when I connect the RCA audio cables the red light on amp goes on and will stay on if wires r left connected.  I have no sound from my woofer only from the rest of the speakers operating soley on radio power.

Any advice or clues  to the problem need help???  Thank you.  

Answer
Hi,

I assume the red light is a "protect" indicator.  Try disconnecting the sub and see if you still get the light without the sub connected.  If you still have a protect light with no sub or speaker connected to the amp, then it's likely that there's an internal defect.  Otherwise, you may have a problem with the sub itself, or the subwoofer wiring.  If there's a shorted speaker wire, or if the sub has a shorted voice coil, it can trigger a protect light on the amp.

Hope this helps!

Brian