When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
check the bulbs first they just could have both blown by chance, or check if there is a fuse just for the rear parking lights (doubtfull). If not get a multimeter and start checking them from the lights going back to the front untill you find where power actually is and work from there.