When turn signals stop working in your 2019 Hyundai Tucson, you lose crucial communication with other drivers. Whether one side, both sides, or specific bulbs don't work helps identify the cause.
Single Side Versus Both Sides
If one side doesn't work but the other does, the problem is specific to that side—typically a bulb, socket, or wiring. If both sides fail, common components are affected—the flasher, multi-function switch, or fuse.
Fast Blinking
Turn signals that blink rapidly (hyper-flash) indicate a burned-out bulb. The flasher detects reduced electrical load and speeds up. Check the side that doesn't illuminate—front or rear bulb on that side has likely failed.
No Blinking at All
If both sides don't work and hazard lights also don't work, the flasher relay or its circuit has failed. If hazards work but turn signals don't, the multi-function switch (turn signal stalk) is suspect.
Multi-Function Switch
The turn signal stalk (multi-function switch) controls turn signals, possibly wipers and headlights. Internal contacts wear over time. Clicking without signals activating suggests switch failure.
Bulb and Socket Issues
Individual bulbs burn out and need replacement. Sockets can corrode, especially in rear lights exposed to moisture. Check bulb filaments and socket contacts. Clean corroded sockets before replacing bulbs.
Fuse Check
Turn signal circuits are fuse-protected. A blown fuse stops operation. The fuse box diagram in your owner's manual identifies the turn signal fuse location.