2000 dodge dakota sport amp/subwoofer wiring

i have a 2000 dodge dakota sport,how to wire amp/subwoofer,there 5 wires of plain speaker wire but they have been unplugged from back of radio but they are still plugged into amp,however i have lifted rear seat to look @ amp & I noticed a small circuit board with a blue wire & a gray wire(board is broken)have any tips on getting sound out of this subwoofer again
Well, if your amp has broken parts..........that's not a good sign...

Depending on the size of the subwoofer, you're probably gonna need an amp to drive it. You can see if it powers up. Just hook up the speaker wires carefully....pos to pos, neg to neg. Be sure not to cross any wires. Most speaker wire has a tracer on the positive side to help eliminate crossed wires......

Sounds like you're gonna need a new amp though, from what you've posted.........
ok,so what I have done is bought a complete amp wiring kit from auto store.My door/dash speakers worked just fine until I rewired head unit correctly(matching colors)but now my door/dash speakers have no sound.I also ran for amp the blue remote wire,audio cables(red/black),pos. straight to battery,ground to frame----but I have a GTQ 360 amp,it has grp1 & grp 2 input it worked & door/dash speakers all worked fine before.Which grp should the audio cables plug into & how can I get my door/dash speakers to work again--thx