I have 2 punch amps in my classic car Iwould like to know should I have a red light lite on amp? Ihave power on amp no sound I also have EQ BEFORE AMPS could that be the problem .car has been sitting in storage for about 5 years dont have any info on amps or eq system bought with car in 90s

If it's only 4 wires, Red & black are typically power. red +12volts & black is ground. Gray would be one channel say right side and green would be left (example) you would ground the negative speaker lead on both sides. That is probably an old unit and make sure your car is negative ground. Some Ford & Nissan are positive grounded for some circuits which you may need to reverse the power connections. Make sure there is an in line fuse on the power wire just in case.

Most amps have a remote on terminal, which takes a small current wire to "turn on" the amp, and when you stop current to that terminal, it turns off the amp. It sounds like this current is still live when you turn the car off, so your amp doesn't know to turn off.

With the car off, test the lead at the remote on terminal (usually blue wire, as I do it) with a dc meter or test probe. If it reads +12v, it shouldn't. Find a new "remote on" power lead. This is generally provided by the "power antenna on" lead out of the deck. Run a wire to the amp from the power antenna on lead, and retest.

I'll bet on success after this.

Bruce

did you check all fuses on amp and coming from battery power wire? also check the ground and rca cables connecting to the unit and make sure the remote wire (small blue wire) didnt come lose thats usualy a sign for the red light

What kind of EQ?

Typically you would place an EQ or any processor in a Tape Loop:

Tape Rec/Out to EQ In; EQ Out to Tape Play/In on the amp. Select Tape Monitor on the amp to place the EQ in-line with whatever source you're playing. Use it's ability to modify the sound sparingly.

UNPLUG SPEAKERS OFF THE AMP
TURN ON AMP IF THIS STILL HAPPEN UNPLUG RCA AND DO SAME TEST IF SAME THING HAPPEN WITH RCA AND SPEAKER UNPLUG AMP HAVE A PROBLEM MY FRIEND

well id say you have cooked your amp and or subs they can only take beatings for so long. show it no mercy it gives it back,does amp smell do subs smell borrow amp see if subs are ok if so it will be your amp.new one .keep the gain down??

try hooking the remote wire to a rem wire on the back of stereo. post and let me know results

USE THE FOR CH RUN ALL THE SPEAKER THE MEANS TWO RCA ONE FOR FRONT AND ONE FOR REAR INTO THE AMP AND NON-FADE REAR-FOR YOUR SUB --POWER FOR EQ--[POWER 'REMOTE AND GROUND]

NO it won't be your battery. Sounds more like your deck.

If you have another amp in the vehicle, swap the RCAs and speakers to see if you get sound through the other amp.

Generally, if the red light is on and there is no significant DC on the speaker terminals, the amp is in good working order (for the older Rockford amps).