By Justin Most turn signal problems cost $15-595 to fix. Burnt bulbs cause hyperflash ($15, DIY, 10 min). Multifunction switches cause intermittent operation ($350-595, dealership). Flasher relays cause complete failure ($30-80, DIY, 20 min). Wiring damage causes intermittent lights ($200-400, professional). IPS module faults trigger warning messages ($100-150 diagnostics). Diagnose which specific failure is causing your symptom using the 5-step guide below—most owners pinpoint the exact problem in 15-20 minutes.
Turn Signal Symptoms & What They Mean
A burnt-out bulb causes rapid blinking. A faulty multifunction switch causes intermittent operation. A failed relay causes complete light failure. Water-damaged housing causes occasional flickering. An IPS module fault triggers warning messages.
- Hyperflash (rapid blinking) – One side flashes abnormally fast. Indicates burnt bulb. Fix: Replace the bulb.
- Complete light failure – Light won’t illuminate on one side. Possible causes: burnt bulb, broken socket, faulty relay, multifunction switch failure, wiring break.
- Intermittent operation – Signal works then suddenly stops, or requires pushing lever harder. Indicates multifunction switch wear. Internal contacts failing.
- “Check Turn Signal” warning message – Dashboard warning appears while lights work. Indicates IPS module issues, loose connectors, or grounding defects.
Root Causes of 2019 Tucson Turn Signal Failure
Burnt bulbs cause 60% of problems. Multifunction switches cause 25%. Flasher relays cause 10%. Wiring damage causes 4%. IPS module faults cause 1%.
- Burnt bulbs (60% of failures) Cost: $5-15 per bulb Time: 10 minutes DIY How to fix: Replace the bulb. Never touch new bulb glass—skin oils cause premature failure.
- Faulty multifunction switches (25% of failures) Cost: $350-595 dealership, $250-350 independent shop Time: 1.5-2 hours labor Why it fails: Tiny electrical contacts corrode over 100,000+ cycles. You’ll need to push harder or click multiple times to engage.
- Failed flasher relays (10% of failures) Cost: $30-80 installed Time: 15-20 minutes DIY What happens: Relay dies, all four lights stop flashing. If only one side fails, the relay isn’t your problem.
- Wiring damage & corroded connections (4% of failures) Cost: $200-400 professional Time: 1-1.5 hours labor Why it happens: Moisture enters light housings. Road salt and water create corrosion at electrical points. Rear bumper-mounted signals particularly vulnerable (positioned low on vehicle).
- IPS module faults (1% of failures) Cost: $100-150 diagnostics only Time: 30-60 minutes dealership scan What it means: Intelligent Power Switch module manages signal power distribution. Rare but generates “Check Turn Signal” warnings even with functional bulbs.
Diagnosing Your 2019 Tucson Turn Signal Problem
Most owners diagnose in 15-20 minutes without any tools. Five sequential tests isolate the failing component.
- Hazard light test – Engage hazard lights. Walk around checking all four signal positions (front and rear, both sides). If one side stays dark during hazards, bulb is burnt. If all hazard lights work but normal turn signals don’t, problem is the multifunction switch, flasher relay, or IPS module, not the bulbs.
- Inspect the light assembly – Open engine bay and trunk. Look for cracked lens housings, moisture inside lens, or loose connectors. Tap bumper area gently. Water intrusion requires light assembly replacement, not just a bulb.
- Test bulb condition – Remove dark bulbs and inspect them. Filament broken or blackened? If bulb looks intact, bulb isn’t the problem. Install a known-good bulb from another socket and test. If problem transfers to that socket, original socket is defective and needs replacement.
- Listen for relay clicks – Activate left turn signal. Listen near steering column and dashboard. You should hear faint clicking at roughly 1-second intervals. No clicking means flasher relay failed. Open your owner’s manual to locate relay, pull it out, and inspect for burn marks or corrosion. New relay ($30-80) fixes most “no clicking” cases.
- Check switch operation – With engine off, move the turn signal lever up and down repeatedly. Does it feel sticky? Require excessive pressure? Fail to click into place? These indicate multifunction switch wear. Sticky or resistant lever means internal contacts are failing.
Repairing Your 2019 Tucson Turn Signal
Match the repair method to your diagnosed problem. DIY repairs work for bulbs and relays ($15-80, 10-20 minutes). Professional repairs necessary for multifunction switches and wiring damage ($250-595, 30-120 minutes).
Bulb Replacement (DIY) – $15-30, 10-15 minutes
Hyperflash symptoms fixed by replacing burnt-out bulb.
Front signals: Reach behind headlight assembly from engine bay. Twist bulb socket counterclockwise (orange-tinted plastic) and pull straight out. Install 1156 or 3157 bulb (verify in owner’s manual). Never handle new bulb glass. Twist socket clockwise until firmly seated.
Rear signals: Open trunk and locate tail light assembly. Remove fasteners (usually 2-3 bolts). Pull assembly out. Rearmost socket is your turn signal. Twist, remove, replace bulb, and reinstall.
Labor cost: Local tire shops charge $25-50. Dealerships charge $75-150.
Flasher Relay Replacement (DIY-Friendly) – $30-80, 15-20 minutes
No-clicking symptoms fixed by replacing failed relay.
Owner’s manual shows exact turn signal relay location (usually under steering column or engine bay fuse panel). Pull old relay straight out, note its position, and insert new one. Ensure it’s fully seated. Test both turn signals immediately.
Multifunction Switch Replacement (Professional Only) – $350-595 dealership, $250-350 independent shop, 1.5-2 hours
Intermittent operation symptoms require dealership multifunction switch replacement. This is the turn signal stalk on your steering column. Replacement requires removing steering column trim panels, disconnecting electrical connector, and potentially removing steering wheel (airbag hazard). Not recommended DIY.
Warranty coverage: If your 2019 is under 5-year/60,000-mile warranty, this repair should be covered. Check warranty status before paying.
Wiring & Corrosion Repairs (Professional Only) – $150-400 per side, 1-1.5 hours
Water-damaged housings require professional sealing or light assembly replacement. Never splice automotive lighting wiring yourself—fire hazard. If moisture entered housing, light assembly gasket failed. Have it professionally resealed ($150-300 per side including labor) or replace entire assembly. Ignoring moisture spreads corrosion to other electrical systems.
2019 Tucson Turn Signal Repair Cost Reference
| Repair | Part Cost | Labor | Total | DIY | Time |
|---|---|---|---|---|---|
| Bulb replacement | $5-15 | $0-50 | $15-50 | Yes | 10-15 min |
| Bulb socket replacement | $20-40 | $50-100 | $75-150 | No | 30 min |
| Flasher relay replacement | $30-80 | $0-40 | $30-80 | Yes | 15-20 min |
| Multifunction switch | $150-250 | $200-350 | $350-595 | No | 1.5-2 hrs |
| Light assembly (corrosion) | $100-200 | $100-200 | $200-400 | No | 1-1.5 hrs |
| Dealership diagnostics | N/A | $100-150 | $100-150 | No | 30-60 min |
Cost-saving tips: Independent mechanics charge $75-125/hour versus dealership $130-160/hour. Ordering parts online and having independent shop install saves 30-40% versus dealership pricing. 5-year/60,000-mile warranty covers multifunction switch repairs at zero cost.
Frequently Asked Questions: 2019 Tucson Turn Signals
Why is my turn signal blinking so fast? Burnt-out bulb on that side causes hyperflash. The circuit compensates by increasing blink rate to alert you. Replace the bulb and hyperflash stops immediately.
Can I drive with broken turn signals? No. Turn signals communicate your intentions to other drivers and prevent accidents. It’s both a safety issue and legal violation.
What’s the difference between a multifunction switch and turn signal stalk? They’re the same component. The multifunction switch (also called turn signal stalk) controls signals, wipers, high beams, and sometimes cruise control. When this single part fails, multiple functions stop working.
Will my warranty cover turn signal repairs? Yes, if under 5 years/60,000 miles. Multifunction switch failures are commonly covered. Check your warranty status before paying for repairs.
Should I replace both bulbs at once? Yes. If one bulb is burnt, the other is aging. Replacing both prevents immediate re-failure after the first repair.
How long does a multifunction switch replacement take? Dealership: 1.5-2 hours labor. The actual part swap is 30 minutes, but steering column trim removal and electrical testing takes additional time.
What’s an IPS module and why does it fail? The Intelligent Power Switch (IPS) module distributes power to turn signals and other electrical loads. It’s part of the body control module system. Faults are rare but trigger “Check Turn Signal” warnings even with functional bulbs. Requires dealership diagnostics ($100-150).
Can moisture in the light housing cause turn signal failure? Yes. Water creates corrosion at electrical contacts, causing intermittent operation or complete failure. Rear bumper-mounted signals are most vulnerable. Requires professional sealing or assembly replacement, not just a new bulb.
Is there a recall for 2019 Tucson turn signal issues? No widespread recall for turn signals on 2019 model. Check NHTSA.gov with your VIN to verify your specific vehicle has no open recalls.