[ACRucrazy]

Sounds like a ghetto hack job install.
Depending if the pioneer is older than dirt (6 years old) these are the wire colors for the deck.
Red-ACCY
Yellow-Memory
Black-Ground
Blue-Ant turn on
White-Front Left +
White/blk-FL-
Grey-Front Right+
Grey/blk Front Right-
Green-Rear left+
Green/Black-RL-
Purple-Rear Right+
Purple/Blk-RR-

Now the power wire colors for the truck, im assuming the hack cut the plugs off,
Accecory-Yellow
Constant Memory- Orange
Ground- Black.
The Cig lighter prolly has an orange and black wire on the plug, for constant and ground.
Good luck.