I have been searching this for a few hours now for this but no luck. I think I am skimming through the text too fast and jumping straight to the pics.

Anyone please tell me how I would hook up my new amp to my stock radio to be able to control the sub level. Like how the stock sub can be turned up or down.

I found that the 14 Pin Black has the sub input wire colors are black with yellow and green with red. Also the 20 Pin Gray has the sub input wire colors are red with blue and white with green. But I don't know which one or if I need to connect both somehow to the new sub.

Pictures would be great or illustrations, even paint lol, I don't care. Anything will help.

 

Tap into the connector in the trunk for the rear sub. There is just 2 wires. The gold(ish) one is the positive.

Take the underneath liner off, reach your hand up in there and unplug the stock sub.

 

Are u using loc or high level inputs? Depending on the year you might have to disable the mic's.

 

First things first...What amp are you using?