Hi there Verhougd, welcome to iboats! While I don't believe your going to be able to find an actual wiring diagram of how the wires are ran in your boat model online, I was able to locate a general wiring color diagram for Tracker and Bass Tracker boats. It should be close enough to your Crestliner fish hawk v2 boat model to get you going. http://www.tacklereviewer.com/freebies/tracker-boats-wiring-diagram
The best thing to try and do would be before removing the wires you have now at each accessory, try to compare the colors you have now to the list above and make needed changes if any.