Hitting that large piece of tire tread, or the removal of front body pieces could have caused the bulb filiments to break loose. As a previous post stated, replace all the bulbs, and see how that goes. It's likely that all the bulbs are the same age, so as one goes, the others are not going to be far behind.
When I was relocated to the Dallas Texas area for a year, I had a local police officer that enjoyed pulling me over in the wee hours of the morning on my way to work to inform me I had a blown light; he used that excuse to run my insurance, registration, and license. Just justifying his job I guess, or stalling until the donut shop opened. After three stops within two months from him, I bought new bulbs for every light fixture that truck had. This way I figured I was good for a couple of years.
I did this recently to my 2000 Ranger. Even bought two new front headlight housings, as I got tired of using the products that claim to cure the faiding of the plastic headlight lenses; they work for about a month, then you start all over again to clear that fog.
Change them all.
Last edited by bucko; 11-05-2014 at 05:04 AM.