My left an right signal lights don't turn on.?

If your left and right signal lights aren't turning on, first check the fuses related to the turn signal system, as a blown fuse can cause both signals to fail. Additionally, inspect the bulbs to ensure they are functioning properly, as burnt-out bulbs can also lead to this issue. If both fuses and bulbs are fine, the problem may lie in the turn signal switch or wiring, which may require professional diagnosis and repair.