Dealer.
The ajar switch is part of the latch, inside the door.
Have the refrigerant recovered at a Section 609 certified facility with a RRR (Recover, Recycle, Recharge) machine, locate the low pressure switch, it should just thread out like a bolt, and thread the new one in. Don't do this with the system charged though.
It is inside the transmission, on the valve body. It is called a TRS (trans range sensor).
If you look at the drivers side of the transmission were the shifter linkage hooks to it you will see an electrical switch behind it. That switch controlls the backup lights among other things.
The oil pressure switch is located on the oil filter adapter. Find the oil filter and you should see the oil pressure switch.
Bulb not installed correctly, broken wire, blown fuse, switch,
There is not a fuel filter to change on a 2004 pacifica. They use the sock in the tanks for that, apparently.
Top of the transmission.. should be offset to the left side and behind the shift tower.
It is on the starter.
The fuel pump shut off switch ( inertia switch ) is in the right front passenger footwell , behind the kick panel access cover
It is in the trans, on the valve body. It is called a trs(trans range sensor).