My wrt160n lights are constantly blinking why?

The Linksys WRT160N has WPS (Wi-Fi Protected Setup). If you are using WPA-PSK encryption (recommended), then you can easily connect the C4780 to your wireless network using WPS:

1) On the Linksys router, press the WPS button that is top of the case just under the Cisco label. When the LED on the button starts to blink, then the WPS process has started.

• Power light blinks. If LAN or WAN cable is plugged in, their respective lights will flash on activity.
• Power light turns off for several seconds.
• All lights, except power light, turn on and then off.
• Power light blinks slowly, then faster, and WLAN light will turn on.
• Once Power light and WLAN light are on solid, the router is fully rebooted.