For audio? Lower back of the bucket seats. My favorite place is under the black piece on the grey part in front of the middle front seat.
Yellow and black
It isn't there, Dodge didn't wire the Dakota with one. You will have to wire the brake controller your self.
the middle one
YesYes
The ground wire at the bulbs is black.
there is no ground wire it is grounded through the case
Anywhere you see more than two wires twisted together, you have a wire harness. There are many on a 1999 Dakota.
in a reference manual at your local library
Purple wire black stripe.
Failed coil/plug wire.
The 2001 Dodge Neon standard radio is grounded to the radio retaining screws. When you install the radio simply attached the ground wire to the radio retaining screws.
Yes, it will just wire in 2 more injecors. Visit dakota-durango.com for more info.