I recently just picked up a used 99 Navigator off a buddy of mine to have for an extra vehicle. The factory sub that is in the back sounds like hell and I am pretty sure it is blown. I would like to replace it with a new one. I did a bunch of searching but couldn't really find much out about the wiring.

I am planning on picking up a new 8" shallow mount sub and probably an amp if neccessary. If somebody tells me the factory amp will give enough power to the new sub then I will gladly save the money. I am a little stumped on the wireing of the amp if I do replace it though. There are five wires going into the amp that I will list below.

1.) Dark Grn/Vio - audio mute
2.) Blk/Light Grn - Ground
6.) Light Grn/Vio - Power
7.) Brn/Org - Subwoofer minus(-)
8.) Red/Blk - Subwoofer Plus(+)

I was told I may need a LOC and 5v-12v trigger in order to hook up the new amp. If anybody could help and tell me exactly what has to be hooked to what I would greatly appreciate it.

The 2 subs I am looking at are the JBL GT804 and Pioneer TS-SW841D. The amp was a Boss R1100M. I found them on Amazon and looks like I could get sub/amp combo for around $120 max. I will link them below. If there are better options out there I would be interested.

TS-SW841D - 8" Shallow-Mount Subwoofer with 500 Watts Max. Power | Pioneer Electronics USA

GTO804 | Powerful & Compact 8 inch Shallow-mount Subwoofer | JBL US

R1100M | Boss Audio Systems

I am not looking for anything earth shattering. I won't be driving the Navigator much and just want something to give me some good full sound.

Thanks