hey guys i have a 2007 f150 flareside fx4 and i want to know if possible to instal an aftermarket sub and amp to shaker 500 but using the harness that is under the rear driver seat. and another question those anybody know is that sub plug in the backseat what those it look like is it the same as in the back of the radio or is it made skinier but longer. thanks please help

 

If you want to run aftermarket the plug in the rear for the audiophile unit could work. However, you need a better power source. The speaker wires from the plug could be used for your inputs to the amp. The shaker connectors will use the connections in your truck, but the mounts for the radio could be a little different. There's no guarantee that you have a the audiophile sub plug, if you don't have the audiophile system. I have a well appointed 2008 Lariat with the premium stereo and it didn't have a sub plug, so I went aftermarket.

 

the back of the shaker has room for 3 plugs. i only used one when i plugged in my factory harness. my old xlt sinlge cd changer on had 2 plugs. idk if that helps.

 

well i have all the 3 plugs in the back of my shaker and on the trucks harness there is 3 plugs i know the smallest one is for the sub so all plugs are connected to the back of shaker but now what i want to know is could i use the sub plug under the rear seat to plug in somehow to my aftermarket amp

 

If you tie in at the sub end of the wires, the small green wire (about 22 ga) is amp turn on at 5v, the large violet (about 14 ga) is battery + fused at 25 amps, the black 18 ga is ground, the brown 18 ga is rca +, and the red is rca -

The amp turn on lead is only 5v and an aftermarket amp needs 12v for the turn on signal, just connect a standard 4 or 5 pin relay to step up the turn on voltage and you will be fine.

Connect pin 86 to the 5v turn on lead (small green wire), pin 85 to ground (black), pin 87 to 12v (large violet wire), and pin 30 to the turn on terminal on the new amp.