Here's what I've got.
My 2007 Honda Civic (automatic transmission) will not crank. Turn the key and the starter clicks. Every so often instead of a click I will get what sounds like an incredible weak version of the car trying to start, but then it just returns to the click. The lights dim and the starter clicks.
New battery, tested before installation.
New battery cable terminals.
Starter removed and taken to the parts store. Tested good at the parts store.
New ignition switch.
New fuses, and relay.
Removed the ground wires going to the body, and the negative battery cable where it goes to the body. Cleaned them with some fine sandpaper and replaced.
All the lights on the dash are normal, Key light flashes and goes out like it is supposed to. Even had the battery in my key changed for good measure to be sure that was not the problem.
Manually turned the engine to makes sure it wasn't seized.
At this point I'm stumped. I have a strong suspicion that the problem is electrical, and somewhere in the ignition system. But I have no clue what else to check.
Any help would be much appreciated.