Gwelfmike--my friend's 96 T-wagon had both backup lights out as of two days ago. I told him about it, because he hadn't had his wife walk around to the back and check (what wife would?). With both backup lights out, the dash bulb failure light on the dash doesn't always light up. If one or the other, yes, because the circuit is unbalanced, but if both are out, the circuit is balanced and hence, no warning light. Replace both and see if they work. Dick