is a nice diagram of the RJ45 Ethernet connector. I made millions of these back in the day, and found that only the good tools provide good results. My RJ45 crimper costs about a hundred bucks way back then.
I would advise getting a couple of RJ45 Ethernet faceplates from Lowes or HD. They come with color coded snap in Ethernet connectors and provide a nice cap/crimp tool to push the wires in and snap a nice cover over them. Mount them in a sheetrock box and use store bought Ethernet cables to connect up the cable ends to the hardware.
If you want to test your equipment, take the router to the source and plug it in. If it works, your cat5 cable is bad. You can actually test that cable with an ohm meter and a helper. Have helper short the white/blue pair and read a short on the other end...