Hi. For starters … look here … Configuring 1+1 Backup by High Availability (HA). Pay particular attention to @Alan’s diagram’s showing of hardware configurations on the WAN sides of the routers. You must include the switches.
Short answer: If I understand your question correctly, yes. If your hardware layout is correct and your configuration is OK VRRP will “transfer” the WAN addresses from master to slave when the former fails (or, technically, the two routers fail to communicate via the LAN-side using VRRP.