I have a 1975 winnebago from dodge Someone messed

Question edited for clarity.
Question moved to model category.

First diagram in this link as shown on JustAnswer, but you don't even need to go there, just click on the diagram.

https://www.google.com/search?q=2002+dodge+dakota+sport+3.9+v6+firing+order

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Remove the distributor cap and check the rotor. If it's good check for spark do this, remove a spark plug wire insert a screwdriver into the boot and then hold the metal part of the screwdriver 1/2in. away from a metal part of the engine block then have someone crank the engine while you look for spark. If good remove the cap from the fuel rail test port then depress the schraeder valve and have someone turn the switch on and fuel should spray out. Do these tests in this order to prevent fire. I hope this helps. Take care.

Here is a diagram of the distributor firing order as well as the cylinder locations

Firing order off the distributor cap to spark plugs.What position is the first spark plug wire on the distributor cap

firing order is 1 8 4 3 6 5 7 2 standing in front of truck. cylinders on passenger side facing you are 2 4 6 8 cylinders on driver side facing you are 1 3 5 7 now this is your spark plugs wires location on distributor cap.with distributor facing you.2 plugs wire on cap 6 oclock position 1 plug wire on cap 8 oclock position,8 plug wire on cap 9 oclock position,4plug wire cap 10 oclock position,3 plug wire on cap 12 oclock position,6 plug wire on cap 1 oclock position, 5 plug wire on cap 3 oclock position, and 7 plug wire on cap 5 oclock position. in order for this to work you must be standing facing the engine all plug wire location on cap should be correct.

Engine Wiring ? or Firing Wiring order ?

You can get this info by using the year ,make and size of engine by calling Autozone If not they have a Chilton manual for it or can get it

Turn the crankshaft till the timing mark is at 0...Check where the rotor points...if towards the back of the engine, turn one more time till it points to front. It is now at #1 on cap. Plugs are 1357 on left bank, 2468 on right. order is 18436572 in that order around cap in the direction the rotor turns when cranking.

go to this link for diagram. one is white spot on distributor cap.

http://autorepair.about.com/library/firing_orders/bl-fo-9144.htm

the firing order is 1 8 4 3 6 5 7 2 clockwise around the cap