The default WiFi password should be on a sticker on either the back or bottom of the modem. If that password is not working, and if you still have access to the system with another device, take a look at the following post. It has info on how to locate the WiFi password(s) and how to change it/them if needed.
Good morning HMSMEDIC88,
It's been a while since we last heard from you, so we will close this thread. I hope Gabe's suggestion put you on the right path towards a solution. If you still have concerns, please start a new thread and include a detailed explanation so we can better assist you.