To give you an example of how a Haynes manual works this is taken right out of mine:

Fuel tank removal and installation:

Steps 1-10 tell you how to take it out
11: Remove the tank from the vehicle
12: Installation is the reverse of removal


Wiring diagrams are in black and white and don't explain troubleshooting at all. They just tell you to take it to a dealer. Then, the dealer uses the Helms to fix your car.

Get the Helms, you won't be disapointed. I would just get the regular one(service manual), if you are fairly good at mechanical things. The service manual does a pretty good job with electrical diagrams, and I believe most of them are in color. If you are not good with that sort of stuff, get both of them.